Home / 10,989.30-16,479.90-5,440.80

Finding the Fourth Proportional to 10,989.30, 16,479.90 and 5,440.80

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Solution

The fourth proportional to 10,989.30, 16,479.90 and 5,440.80 is: 8,159.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.30 : 16,479.90 = 5,440.80 : x
  2. Step 2: Convert to fraction form
    10,989.30/16,479.90 = 5,440.80/x
  3. Step 3: Cross multiply
    10,989.30x = 16,479.90 × 5,440.80
  4. Step 4: Simplify right side
    10,989.30x = 89,663,839.92
  5. Step 5: Solve for x
    x = 89,663,839.92/10,989.30
  6. Step 6: Final answer
    x = 8,159.19

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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.