Home / 20,963.16-28,929.15-11,531.66

Finding the Fourth Proportional to 20,963.16, 28,929.15 and 11,531.66

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Solution

The fourth proportional to 20,963.16, 28,929.15 and 11,531.66 is: 15,913.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.16 : 28,929.15 = 11,531.66 : x
  2. Step 2: Convert to fraction form
    20,963.16/28,929.15 = 11,531.66/x
  3. Step 3: Cross multiply
    20,963.16x = 28,929.15 × 11,531.66
  4. Step 4: Simplify right side
    20,963.16x = 333,600,977.24
  5. Step 5: Solve for x
    x = 333,600,977.24/20,963.16
  6. Step 6: Final answer
    x = 15,913.68

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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.