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Finding the Fourth Proportional to 8,612.34, 12,918.48 and 5,689.95

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Solution

The fourth proportional to 8,612.34, 12,918.48 and 5,689.95 is: 8,534.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.34 : 12,918.48 = 5,689.95 : x
  2. Step 2: Convert to fraction form
    8,612.34/12,918.48 = 5,689.95/x
  3. Step 3: Cross multiply
    8,612.34x = 12,918.48 × 5,689.95
  4. Step 4: Simplify right side
    8,612.34x = 73,505,505.28
  5. Step 5: Solve for x
    x = 73,505,505.28/8,612.34
  6. Step 6: Final answer
    x = 8,534.91

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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.