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Finding the Fourth Proportional to 15,141.68, 20,892.92 and 13,916.81

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Solution

The fourth proportional to 15,141.68, 20,892.92 and 13,916.81 is: 19,202.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,141.68 : 20,892.92 = 13,916.81 : x
  2. Step 2: Convert to fraction form
    15,141.68/20,892.92 = 13,916.81/x
  3. Step 3: Cross multiply
    15,141.68x = 20,892.92 × 13,916.81
  4. Step 4: Simplify right side
    15,141.68x = 290,762,693.52
  5. Step 5: Solve for x
    x = 290,762,693.52/15,141.68
  6. Step 6: Final answer
    x = 19,202.80

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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.