Home / 10,428.30-15,631.50-7,650.80

Finding the Fourth Proportional to 10,428.30, 15,631.50 and 7,650.80

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Solution

The fourth proportional to 10,428.30, 15,631.50 and 7,650.80 is: 11,468.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,428.30 : 15,631.50 = 7,650.80 : x
  2. Step 2: Convert to fraction form
    10,428.30/15,631.50 = 7,650.80/x
  3. Step 3: Cross multiply
    10,428.30x = 15,631.50 × 7,650.80
  4. Step 4: Simplify right side
    10,428.30x = 119,593,480.20
  5. Step 5: Solve for x
    x = 119,593,480.20/10,428.30
  6. Step 6: Final answer
    x = 11,468.17

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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.