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Finding the Fourth Proportional to 7,240.92, 9,989.19 and 4,256.88

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Solution

The fourth proportional to 7,240.92, 9,989.19 and 4,256.88 is: 5,872.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,240.92 : 9,989.19 = 4,256.88 : x
  2. Step 2: Convert to fraction form
    7,240.92/9,989.19 = 4,256.88/x
  3. Step 3: Cross multiply
    7,240.92x = 9,989.19 × 4,256.88
  4. Step 4: Simplify right side
    7,240.92x = 42,522,783.13
  5. Step 5: Solve for x
    x = 42,522,783.13/7,240.92
  6. Step 6: Final answer
    x = 5,872.57

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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.