Home / 13,251.28-18,294.80-8,778.84

Finding the Fourth Proportional to 13,251.28, 18,294.80 and 8,778.84

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Solution

The fourth proportional to 13,251.28, 18,294.80 and 8,778.84 is: 12,120.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.28 : 18,294.80 = 8,778.84 : x
  2. Step 2: Convert to fraction form
    13,251.28/18,294.80 = 8,778.84/x
  3. Step 3: Cross multiply
    13,251.28x = 18,294.80 × 8,778.84
  4. Step 4: Simplify right side
    13,251.28x = 160,607,122.03
  5. Step 5: Solve for x
    x = 160,607,122.03/13,251.28
  6. Step 6: Final answer
    x = 12,120.12

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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.