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Finding the Fourth Proportional to 7,127.31, 9,836.90 and 4,144.89

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Solution

The fourth proportional to 7,127.31, 9,836.90 and 4,144.89 is: 5,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,127.31 : 9,836.90 = 4,144.89 : x
  2. Step 2: Convert to fraction form
    7,127.31/9,836.90 = 4,144.89/x
  3. Step 3: Cross multiply
    7,127.31x = 9,836.90 × 4,144.89
  4. Step 4: Simplify right side
    7,127.31x = 40,772,868.44
  5. Step 5: Solve for x
    x = 40,772,868.44/7,127.31
  6. Step 6: Final answer
    x = 5,720.65

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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.