Home / 20,887.30-31,329.29-8,398.52

Finding the Fourth Proportional to 20,887.30, 31,329.29 and 8,398.52

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Solution

The fourth proportional to 20,887.30, 31,329.29 and 8,398.52 is: 12,597.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.30 : 31,329.29 = 8,398.52 : x
  2. Step 2: Convert to fraction form
    20,887.30/31,329.29 = 8,398.52/x
  3. Step 3: Cross multiply
    20,887.30x = 31,329.29 × 8,398.52
  4. Step 4: Simplify right side
    20,887.30x = 263,119,668.65
  5. Step 5: Solve for x
    x = 263,119,668.65/20,887.30
  6. Step 6: Final answer
    x = 12,597.11

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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.