Home / 21,129.92-31,714.08-11,277.60

Finding the Fourth Proportional to 21,129.92, 31,714.08 and 11,277.60

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Solution

The fourth proportional to 21,129.92, 31,714.08 and 11,277.60 is: 16,926.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.92 : 31,714.08 = 11,277.60 : x
  2. Step 2: Convert to fraction form
    21,129.92/31,714.08 = 11,277.60/x
  3. Step 3: Cross multiply
    21,129.92x = 31,714.08 × 11,277.60
  4. Step 4: Simplify right side
    21,129.92x = 357,658,708.61
  5. Step 5: Solve for x
    x = 357,658,708.61/21,129.92
  6. Step 6: Final answer
    x = 16,926.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.