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Finding the Fourth Proportional to 12,671.52, 17,468.40 and 8,686.32

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Solution

The fourth proportional to 12,671.52, 17,468.40 and 8,686.32 is: 11,974.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.52 : 17,468.40 = 8,686.32 : x
  2. Step 2: Convert to fraction form
    12,671.52/17,468.40 = 8,686.32/x
  3. Step 3: Cross multiply
    12,671.52x = 17,468.40 × 8,686.32
  4. Step 4: Simplify right side
    12,671.52x = 151,736,112.29
  5. Step 5: Solve for x
    x = 151,736,112.29/12,671.52
  6. Step 6: Final answer
    x = 11,974.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.