Home / 10,549.76-15,817.28-6,390.86

Finding the Fourth Proportional to 10,549.76, 15,817.28 and 6,390.86

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Solution

The fourth proportional to 10,549.76, 15,817.28 and 6,390.86 is: 9,581.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,549.76 : 15,817.28 = 6,390.86 : x
  2. Step 2: Convert to fraction form
    10,549.76/15,817.28 = 6,390.86/x
  3. Step 3: Cross multiply
    10,549.76x = 15,817.28 × 6,390.86
  4. Step 4: Simplify right side
    10,549.76x = 101,086,022.06
  5. Step 5: Solve for x
    x = 101,086,022.06/10,549.76
  6. Step 6: Final answer
    x = 9,581.83

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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.