Home / 20,929.32-28,881.80-11,497.28

Finding the Fourth Proportional to 20,929.32, 28,881.80 and 11,497.28

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Solution

The fourth proportional to 20,929.32, 28,881.80 and 11,497.28 is: 15,865.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.32 : 28,881.80 = 11,497.28 : x
  2. Step 2: Convert to fraction form
    20,929.32/28,881.80 = 11,497.28/x
  3. Step 3: Cross multiply
    20,929.32x = 28,881.80 × 11,497.28
  4. Step 4: Simplify right side
    20,929.32x = 332,062,141.50
  5. Step 5: Solve for x
    x = 332,062,141.50/20,929.32
  6. Step 6: Final answer
    x = 15,865.88

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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.