Home / 20,569.05-28,385.40-11,137.61

Finding the Fourth Proportional to 20,569.05, 28,385.40 and 11,137.61

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Solution

The fourth proportional to 20,569.05, 28,385.40 and 11,137.61 is: 15,369.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.05 : 28,385.40 = 11,137.61 : x
  2. Step 2: Convert to fraction form
    20,569.05/28,385.40 = 11,137.61/x
  3. Step 3: Cross multiply
    20,569.05x = 28,385.40 × 11,137.61
  4. Step 4: Simplify right side
    20,569.05x = 316,145,372.97
  5. Step 5: Solve for x
    x = 316,145,372.97/20,569.05
  6. Step 6: Final answer
    x = 15,369.96

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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.