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Finding the Fourth Proportional to 12,371.60, 18,528.60 and 8,454.80

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Solution

The fourth proportional to 12,371.60, 18,528.60 and 8,454.80 is: 12,662.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,371.60 : 18,528.60 = 8,454.80 : x
  2. Step 2: Convert to fraction form
    12,371.60/18,528.60 = 8,454.80/x
  3. Step 3: Cross multiply
    12,371.60x = 18,528.60 × 8,454.80
  4. Step 4: Simplify right side
    12,371.60x = 156,655,607.28
  5. Step 5: Solve for x
    x = 156,655,607.28/12,371.60
  6. Step 6: Final answer
    x = 12,662.52

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1.5x scale

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.