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Finding the Fourth Proportional to 12,500.40, 18,747.90 and 5,480.40

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Solution

The fourth proportional to 12,500.40, 18,747.90 and 5,480.40 is: 8,219.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,500.40 : 18,747.90 = 5,480.40 : x
  2. Step 2: Convert to fraction form
    12,500.40/18,747.90 = 5,480.40/x
  3. Step 3: Cross multiply
    12,500.40x = 18,747.90 × 5,480.40
  4. Step 4: Simplify right side
    12,500.40x = 102,745,991.16
  5. Step 5: Solve for x
    x = 102,745,991.16/12,500.40
  6. Step 6: Final answer
    x = 8,219.42

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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.