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Finding the Fourth Proportional to 7,877.80, 10,871.22 and 4,340.92

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Solution

The fourth proportional to 7,877.80, 10,871.22 and 4,340.92 is: 5,990.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.80 : 10,871.22 = 4,340.92 : x
  2. Step 2: Convert to fraction form
    7,877.80/10,871.22 = 4,340.92/x
  3. Step 3: Cross multiply
    7,877.80x = 10,871.22 × 4,340.92
  4. Step 4: Simplify right side
    7,877.80x = 47,191,096.32
  5. Step 5: Solve for x
    x = 47,191,096.32/7,877.80
  6. Step 6: Final answer
    x = 5,990.39

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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.