Home / 15,178.80-22,772.20-5,318.08

Finding the Fourth Proportional to 15,178.80, 22,772.20 and 5,318.08

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Solution

The fourth proportional to 15,178.80, 22,772.20 and 5,318.08 is: 7,978.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,178.80 : 22,772.20 = 5,318.08 : x
  2. Step 2: Convert to fraction form
    15,178.80/22,772.20 = 5,318.08/x
  3. Step 3: Cross multiply
    15,178.80x = 22,772.20 × 5,318.08
  4. Step 4: Simplify right side
    15,178.80x = 121,104,381.38
  5. Step 5: Solve for x
    x = 121,104,381.38/15,178.80
  6. Step 6: Final answer
    x = 7,978.52

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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.