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Finding the Fourth Proportional to 20,474.10, 30,711.15 and 13,913.10

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Solution

The fourth proportional to 20,474.10, 30,711.15 and 13,913.10 is: 20,869.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.10 : 30,711.15 = 13,913.10 : x
  2. Step 2: Convert to fraction form
    20,474.10/30,711.15 = 13,913.10/x
  3. Step 3: Cross multiply
    20,474.10x = 30,711.15 × 13,913.10
  4. Step 4: Simplify right side
    20,474.10x = 427,287,301.07
  5. Step 5: Solve for x
    x = 427,287,301.07/20,474.10
  6. Step 6: Final answer
    x = 20,869.65

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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.