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Finding the Fourth Proportional to 15,086.13, 20,817.86 and 8,371.34

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Solution

The fourth proportional to 15,086.13, 20,817.86 and 8,371.34 is: 11,551.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,086.13 : 20,817.86 = 8,371.34 : x
  2. Step 2: Convert to fraction form
    15,086.13/20,817.86 = 8,371.34/x
  3. Step 3: Cross multiply
    15,086.13x = 20,817.86 × 8,371.34
  4. Step 4: Simplify right side
    15,086.13x = 174,273,384.13
  5. Step 5: Solve for x
    x = 174,273,384.13/15,086.13
  6. Step 6: Final answer
    x = 11,551.89

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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.