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Finding the Fourth Proportional to 7,661.48, 11,489.78 and 2,981.18

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Solution

The fourth proportional to 7,661.48, 11,489.78 and 2,981.18 is: 4,470.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,661.48 : 11,489.78 = 2,981.18 : x
  2. Step 2: Convert to fraction form
    7,661.48/11,489.78 = 2,981.18/x
  3. Step 3: Cross multiply
    7,661.48x = 11,489.78 × 2,981.18
  4. Step 4: Simplify right side
    7,661.48x = 34,253,102.34
  5. Step 5: Solve for x
    x = 34,253,102.34/7,661.48
  6. Step 6: Final answer
    x = 4,470.82

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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.