Home / 15,385.32-21,248.46-13,397.58

Finding the Fourth Proportional to 15,385.32, 21,248.46 and 13,397.58

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Solution

The fourth proportional to 15,385.32, 21,248.46 and 13,397.58 is: 18,503.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.32 : 21,248.46 = 13,397.58 : x
  2. Step 2: Convert to fraction form
    15,385.32/21,248.46 = 13,397.58/x
  3. Step 3: Cross multiply
    15,385.32x = 21,248.46 × 13,397.58
  4. Step 4: Simplify right side
    15,385.32x = 284,677,942.73
  5. Step 5: Solve for x
    x = 284,677,942.73/15,385.32
  6. Step 6: Final answer
    x = 18,503.22

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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.