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Finding the Fourth Proportional to 10,325.20, 15,487.80 and 5,940.40

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Solution

The fourth proportional to 10,325.20, 15,487.80 and 5,940.40 is: 8,910.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,325.20 : 15,487.80 = 5,940.40 : x
  2. Step 2: Convert to fraction form
    10,325.20/15,487.80 = 5,940.40/x
  3. Step 3: Cross multiply
    10,325.20x = 15,487.80 × 5,940.40
  4. Step 4: Simplify right side
    10,325.20x = 92,003,727.12
  5. Step 5: Solve for x
    x = 92,003,727.12/10,325.20
  6. Step 6: Final answer
    x = 8,910.60

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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.