Home / 20,712.74-31,068.96-12,395.06

Finding the Fourth Proportional to 20,712.74, 31,068.96 and 12,395.06

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Solution

The fourth proportional to 20,712.74, 31,068.96 and 12,395.06 is: 18,592.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.74 : 31,068.96 = 12,395.06 : x
  2. Step 2: Convert to fraction form
    20,712.74/31,068.96 = 12,395.06/x
  3. Step 3: Cross multiply
    20,712.74x = 31,068.96 × 12,395.06
  4. Step 4: Simplify right side
    20,712.74x = 385,101,623.34
  5. Step 5: Solve for x
    x = 385,101,623.34/20,712.74
  6. Step 6: Final answer
    x = 18,592.50

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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.