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Finding the Fourth Proportional to 6,507.54, 8,981.28 and 3,989.15

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Solution

The fourth proportional to 6,507.54, 8,981.28 and 3,989.15 is: 5,505.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,507.54 : 8,981.28 = 3,989.15 : x
  2. Step 2: Convert to fraction form
    6,507.54/8,981.28 = 3,989.15/x
  3. Step 3: Cross multiply
    6,507.54x = 8,981.28 × 3,989.15
  4. Step 4: Simplify right side
    6,507.54x = 35,827,661.89
  5. Step 5: Solve for x
    x = 35,827,661.89/6,507.54
  6. Step 6: Final answer
    x = 5,505.56

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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.