Home / 21,072.38-29,082.68-20,380.04

Finding the Fourth Proportional to 21,072.38, 29,082.68 and 20,380.04

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Solution

The fourth proportional to 21,072.38, 29,082.68 and 20,380.04 is: 28,127.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.38 : 29,082.68 = 20,380.04 : x
  2. Step 2: Convert to fraction form
    21,072.38/29,082.68 = 20,380.04/x
  3. Step 3: Cross multiply
    21,072.38x = 29,082.68 × 20,380.04
  4. Step 4: Simplify right side
    21,072.38x = 592,706,181.71
  5. Step 5: Solve for x
    x = 592,706,181.71/21,072.38
  6. Step 6: Final answer
    x = 28,127.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.