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Finding the Fourth Proportional to 9,028.80, 13,559.40 and 8,737.20

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Solution

The fourth proportional to 9,028.80, 13,559.40 and 8,737.20 is: 13,121.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,028.80 : 13,559.40 = 8,737.20 : x
  2. Step 2: Convert to fraction form
    9,028.80/13,559.40 = 8,737.20/x
  3. Step 3: Cross multiply
    9,028.80x = 13,559.40 × 8,737.20
  4. Step 4: Simplify right side
    9,028.80x = 118,471,189.68
  5. Step 5: Solve for x
    x = 118,471,189.68/9,028.80
  6. Step 6: Final answer
    x = 13,121.48

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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.