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Finding the Fourth Proportional to 10,624.80, 15,907.20 and 5,615.82

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Solution

The fourth proportional to 10,624.80, 15,907.20 and 5,615.82 is: 8,407.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,624.80 : 15,907.20 = 5,615.82 : x
  2. Step 2: Convert to fraction form
    10,624.80/15,907.20 = 5,615.82/x
  3. Step 3: Cross multiply
    10,624.80x = 15,907.20 × 5,615.82
  4. Step 4: Simplify right side
    10,624.80x = 89,331,971.90
  5. Step 5: Solve for x
    x = 89,331,971.90/10,624.80
  6. Step 6: Final answer
    x = 8,407.87

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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.