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Finding the Fourth Proportional to 15,128.80, 22,696.80 and 6,359.20

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Solution

The fourth proportional to 15,128.80, 22,696.80 and 6,359.20 is: 9,540.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.80 : 22,696.80 = 6,359.20 : x
  2. Step 2: Convert to fraction form
    15,128.80/22,696.80 = 6,359.20/x
  3. Step 3: Cross multiply
    15,128.80x = 22,696.80 × 6,359.20
  4. Step 4: Simplify right side
    15,128.80x = 144,333,490.56
  5. Step 5: Solve for x
    x = 144,333,490.56/15,128.80
  6. Step 6: Final answer
    x = 9,540.31

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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.