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Finding the Fourth Proportional to 12,913.92, 17,818.84 and 8,671.14

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Solution

The fourth proportional to 12,913.92, 17,818.84 and 8,671.14 is: 11,964.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.92 : 17,818.84 = 8,671.14 : x
  2. Step 2: Convert to fraction form
    12,913.92/17,818.84 = 8,671.14/x
  3. Step 3: Cross multiply
    12,913.92x = 17,818.84 × 8,671.14
  4. Step 4: Simplify right side
    12,913.92x = 154,509,656.28
  5. Step 5: Solve for x
    x = 154,509,656.28/12,913.92
  6. Step 6: Final answer
    x = 11,964.58

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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.