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Finding the Fourth Proportional to 9,039.76, 12,464.24 and 7,245.80

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Solution

The fourth proportional to 9,039.76, 12,464.24 and 7,245.80 is: 9,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,039.76 : 12,464.24 = 7,245.80 : x
  2. Step 2: Convert to fraction form
    9,039.76/12,464.24 = 7,245.80/x
  3. Step 3: Cross multiply
    9,039.76x = 12,464.24 × 7,245.80
  4. Step 4: Simplify right side
    9,039.76x = 90,313,390.19
  5. Step 5: Solve for x
    x = 90,313,390.19/9,039.76
  6. Step 6: Final answer
    x = 9,990.68

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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.