Home / 21,177.76-31,772.16-6,387.36

Finding the Fourth Proportional to 21,177.76, 31,772.16 and 6,387.36

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Solution

The fourth proportional to 21,177.76, 31,772.16 and 6,387.36 is: 9,582.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.76 : 31,772.16 = 6,387.36 : x
  2. Step 2: Convert to fraction form
    21,177.76/31,772.16 = 6,387.36/x
  3. Step 3: Cross multiply
    21,177.76x = 31,772.16 × 6,387.36
  4. Step 4: Simplify right side
    21,177.76x = 202,940,223.90
  5. Step 5: Solve for x
    x = 202,940,223.90/21,177.76
  6. Step 6: Final answer
    x = 9,582.70

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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.