Home / 3,658.40-5,042.72-2,871.12

Finding the Fourth Proportional to 3,658.40, 5,042.72 and 2,871.12

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Solution

The fourth proportional to 3,658.40, 5,042.72 and 2,871.12 is: 3,957.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,658.40 : 5,042.72 = 2,871.12 : x
  2. Step 2: Convert to fraction form
    3,658.40/5,042.72 = 2,871.12/x
  3. Step 3: Cross multiply
    3,658.40x = 5,042.72 × 2,871.12
  4. Step 4: Simplify right side
    3,658.40x = 14,478,254.25
  5. Step 5: Solve for x
    x = 14,478,254.25/3,658.40
  6. Step 6: Final answer
    x = 3,957.54

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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.