Home / 20,963.76-28,929.14-11,403.65

Finding the Fourth Proportional to 20,963.76, 28,929.14 and 11,403.65

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Solution

The fourth proportional to 20,963.76, 28,929.14 and 11,403.65 is: 15,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.76 : 28,929.14 = 11,403.65 : x
  2. Step 2: Convert to fraction form
    20,963.76/28,929.14 = 11,403.65/x
  3. Step 3: Cross multiply
    20,963.76x = 28,929.14 × 11,403.65
  4. Step 4: Simplify right side
    20,963.76x = 329,897,787.36
  5. Step 5: Solve for x
    x = 329,897,787.36/20,963.76
  6. Step 6: Final answer
    x = 15,736.58

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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.