Home / 20,841.30-31,248.13-11,485.80

Finding the Fourth Proportional to 20,841.30, 31,248.13 and 11,485.80

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Solution

The fourth proportional to 20,841.30, 31,248.13 and 11,485.80 is: 17,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.30 : 31,248.13 = 11,485.80 : x
  2. Step 2: Convert to fraction form
    20,841.30/31,248.13 = 11,485.80/x
  3. Step 3: Cross multiply
    20,841.30x = 31,248.13 × 11,485.80
  4. Step 4: Simplify right side
    20,841.30x = 358,909,764.38
  5. Step 5: Solve for x
    x = 358,909,764.38/20,841.30
  6. Step 6: Final answer
    x = 17,221.08

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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.