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Finding the Fourth Proportional to 7,912.49, 10,916.17 and 5,079.11

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Solution

The fourth proportional to 7,912.49, 10,916.17 and 5,079.11 is: 7,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.49 : 10,916.17 = 5,079.11 : x
  2. Step 2: Convert to fraction form
    7,912.49/10,916.17 = 5,079.11/x
  3. Step 3: Cross multiply
    7,912.49x = 10,916.17 × 5,079.11
  4. Step 4: Simplify right side
    7,912.49x = 55,444,360.93
  5. Step 5: Solve for x
    x = 55,444,360.93/7,912.49
  6. Step 6: Final answer
    x = 7,007.20

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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.