Home / 20,702.35-28,569.24-11,270.91

Finding the Fourth Proportional to 20,702.35, 28,569.24 and 11,270.91

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Solution

The fourth proportional to 20,702.35, 28,569.24 and 11,270.91 is: 15,553.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.35 : 28,569.24 = 11,270.91 : x
  2. Step 2: Convert to fraction form
    20,702.35/28,569.24 = 11,270.91/x
  3. Step 3: Cross multiply
    20,702.35x = 28,569.24 × 11,270.91
  4. Step 4: Simplify right side
    20,702.35x = 322,001,332.81
  5. Step 5: Solve for x
    x = 322,001,332.81/20,702.35
  6. Step 6: Final answer
    x = 15,553.86

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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.