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Finding the Fourth Proportional to 15,059.38, 20,781.38 and 8,686.23

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Solution

The fourth proportional to 15,059.38, 20,781.38 and 8,686.23 is: 11,986.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.38 : 20,781.38 = 8,686.23 : x
  2. Step 2: Convert to fraction form
    15,059.38/20,781.38 = 8,686.23/x
  3. Step 3: Cross multiply
    15,059.38x = 20,781.38 × 8,686.23
  4. Step 4: Simplify right side
    15,059.38x = 180,511,846.40
  5. Step 5: Solve for x
    x = 180,511,846.40/15,059.38
  6. Step 6: Final answer
    x = 11,986.68

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Half scale
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Double scale
Find fourth proportional to 15,060.38, 20,782.76 and 8,687.23
Similar ratio
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1.5x scale

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.