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Finding the Fourth Proportional to 7,072.89, 9,760.59 and 3,929.08

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Solution

The fourth proportional to 7,072.89, 9,760.59 and 3,929.08 is: 5,422.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,072.89 : 9,760.59 = 3,929.08 : x
  2. Step 2: Convert to fraction form
    7,072.89/9,760.59 = 3,929.08/x
  3. Step 3: Cross multiply
    7,072.89x = 9,760.59 × 3,929.08
  4. Step 4: Simplify right side
    7,072.89x = 38,350,114.56
  5. Step 5: Solve for x
    x = 38,350,114.56/7,072.89
  6. Step 6: Final answer
    x = 5,422.13

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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.