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Finding the Fourth Proportional to 35,540.80, 53,296.80 and 12,155.20

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Solution

The fourth proportional to 35,540.80, 53,296.80 and 12,155.20 is: 18,227.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,540.80 : 53,296.80 = 12,155.20 : x
  2. Step 2: Convert to fraction form
    35,540.80/53,296.80 = 12,155.20/x
  3. Step 3: Cross multiply
    35,540.80x = 53,296.80 × 12,155.20
  4. Step 4: Simplify right side
    35,540.80x = 647,833,263.36
  5. Step 5: Solve for x
    x = 647,833,263.36/35,540.80
  6. Step 6: Final answer
    x = 18,227.88

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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.