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Finding the Fourth Proportional to 7,240.92, 9,989.10 and 5,005.89

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Solution

The fourth proportional to 7,240.92, 9,989.10 and 5,005.89 is: 6,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,240.92 : 9,989.10 = 5,005.89 : x
  2. Step 2: Convert to fraction form
    7,240.92/9,989.10 = 5,005.89/x
  3. Step 3: Cross multiply
    7,240.92x = 9,989.10 × 5,005.89
  4. Step 4: Simplify right side
    7,240.92x = 50,004,335.80
  5. Step 5: Solve for x
    x = 50,004,335.80/7,240.92
  6. Step 6: Final answer
    x = 6,905.80

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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.