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Finding the Fourth Proportional to 12,480.63, 18,737.30 and 8,347.20

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Solution

The fourth proportional to 12,480.63, 18,737.30 and 8,347.20 is: 12,531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.63 : 18,737.30 = 8,347.20 : x
  2. Step 2: Convert to fraction form
    12,480.63/18,737.30 = 8,347.20/x
  3. Step 3: Cross multiply
    12,480.63x = 18,737.30 × 8,347.20
  4. Step 4: Simplify right side
    12,480.63x = 156,403,990.56
  5. Step 5: Solve for x
    x = 156,403,990.56/12,480.63
  6. Step 6: Final answer
    x = 12,531.74

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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.