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Finding the Fourth Proportional to 15,013.10, 20,723.92 and 13,438.46

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Solution

The fourth proportional to 15,013.10, 20,723.92 and 13,438.46 is: 18,550.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.10 : 20,723.92 = 13,438.46 : x
  2. Step 2: Convert to fraction form
    15,013.10/20,723.92 = 13,438.46/x
  3. Step 3: Cross multiply
    15,013.10x = 20,723.92 × 13,438.46
  4. Step 4: Simplify right side
    15,013.10x = 278,497,569.96
  5. Step 5: Solve for x
    x = 278,497,569.96/15,013.10
  6. Step 6: Final answer
    x = 18,550.30

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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.