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Finding the Fourth Proportional to 10,402.20, 15,583.20 and 8,060.88

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Solution

The fourth proportional to 10,402.20, 15,583.20 and 8,060.88 is: 12,075.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,402.20 : 15,583.20 = 8,060.88 : x
  2. Step 2: Convert to fraction form
    10,402.20/15,583.20 = 8,060.88/x
  3. Step 3: Cross multiply
    10,402.20x = 15,583.20 × 8,060.88
  4. Step 4: Simplify right side
    10,402.20x = 125,614,305.22
  5. Step 5: Solve for x
    x = 125,614,305.22/10,402.20
  6. Step 6: Final answer
    x = 12,075.74

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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.