Home / 20,736,047.40-31,104,071.10-12,211,996.20

Finding the Fourth Proportional to 20,736,047.40, 31,104,071.10 and 12,211,996.20

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Solution

The fourth proportional to 20,736,047.40, 31,104,071.10 and 12,211,996.20 is: 18,317,994.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736,047.40 : 31,104,071.10 = 12,211,996.20 : x
  2. Step 2: Convert to fraction form
    20,736,047.40/31,104,071.10 = 12,211,996.20/x
  3. Step 3: Cross multiply
    20,736,047.40x = 31,104,071.10 × 12,211,996.20
  4. Step 4: Simplify right side
    20,736,047.40x = 379,842,798,077,729.81
  5. Step 5: Solve for x
    x = 379,842,798,077,729.81/20,736,047.40
  6. Step 6: Final answer
    x = 18,317,994.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.