Home / 13,132.50-18,122.85-9,778.20

Finding the Fourth Proportional to 13,132.50, 18,122.85 and 9,778.20

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Solution

The fourth proportional to 13,132.50, 18,122.85 and 9,778.20 is: 13,493.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,132.50 : 18,122.85 = 9,778.20 : x
  2. Step 2: Convert to fraction form
    13,132.50/18,122.85 = 9,778.20/x
  3. Step 3: Cross multiply
    13,132.50x = 18,122.85 × 9,778.20
  4. Step 4: Simplify right side
    13,132.50x = 177,208,851.87
  5. Step 5: Solve for x
    x = 177,208,851.87/13,132.50
  6. Step 6: Final answer
    x = 13,493.92

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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.