Home / 8,542.78-12,815.88-3,612.40

Finding the Fourth Proportional to 8,542.78, 12,815.88 and 3,612.40

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Solution

The fourth proportional to 8,542.78, 12,815.88 and 3,612.40 is: 5,419.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,542.78 : 12,815.88 = 3,612.40 : x
  2. Step 2: Convert to fraction form
    8,542.78/12,815.88 = 3,612.40/x
  3. Step 3: Cross multiply
    8,542.78x = 12,815.88 × 3,612.40
  4. Step 4: Simplify right side
    8,542.78x = 46,296,084.91
  5. Step 5: Solve for x
    x = 46,296,084.91/8,542.78
  6. Step 6: Final answer
    x = 5,419.32

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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.