Home / 10,108.88-15,138-6,399.92

Finding the Fourth Proportional to 10,108.88, 15,138 and 6,399.92

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Solution

The fourth proportional to 10,108.88, 15,138 and 6,399.92 is: 9,583.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,108.88 : 15,138 = 6,399.92 : x
  2. Step 2: Convert to fraction form
    10,108.88/15,138 = 6,399.92/x
  3. Step 3: Cross multiply
    10,108.88x = 15,138 × 6,399.92
  4. Step 4: Simplify right side
    10,108.88x = 96,881,988.96
  5. Step 5: Solve for x
    x = 96,881,988.96/10,108.88
  6. Step 6: Final answer
    x = 9,583.85

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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.