Home / 20,220.30-30,330.45-18,106.20

Finding the Fourth Proportional to 20,220.30, 30,330.45 and 18,106.20

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Solution

The fourth proportional to 20,220.30, 30,330.45 and 18,106.20 is: 27,159.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.30 : 30,330.45 = 18,106.20 : x
  2. Step 2: Convert to fraction form
    20,220.30/30,330.45 = 18,106.20/x
  3. Step 3: Cross multiply
    20,220.30x = 30,330.45 × 18,106.20
  4. Step 4: Simplify right side
    20,220.30x = 549,169,193.79
  5. Step 5: Solve for x
    x = 549,169,193.79/20,220.30
  6. Step 6: Final answer
    x = 27,159.30

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Half scale
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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.