Home / 10,105.35-15,158.03-7,318.95

Finding the Fourth Proportional to 10,105.35, 15,158.03 and 7,318.95

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Solution

The fourth proportional to 10,105.35, 15,158.03 and 7,318.95 is: 10,978.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,105.35 : 15,158.03 = 7,318.95 : x
  2. Step 2: Convert to fraction form
    10,105.35/15,158.03 = 7,318.95/x
  3. Step 3: Cross multiply
    10,105.35x = 15,158.03 × 7,318.95
  4. Step 4: Simplify right side
    10,105.35x = 110,940,827.07
  5. Step 5: Solve for x
    x = 110,940,827.07/10,105.35
  6. Step 6: Final answer
    x = 10,978.43

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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.