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Finding the Fourth Proportional to 7,877.28, 10,871.13 and 4,340.49

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Solution

The fourth proportional to 7,877.28, 10,871.13 and 4,340.49 is: 5,990.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.28 : 10,871.13 = 4,340.49 : x
  2. Step 2: Convert to fraction form
    7,877.28/10,871.13 = 4,340.49/x
  3. Step 3: Cross multiply
    7,877.28x = 10,871.13 × 4,340.49
  4. Step 4: Simplify right side
    7,877.28x = 47,186,031.05
  5. Step 5: Solve for x
    x = 47,186,031.05/7,877.28
  6. Step 6: Final answer
    x = 5,990.14

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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.