Home / 4,078.76-5,642.46-3,931.13

Finding the Fourth Proportional to 4,078.76, 5,642.46 and 3,931.13

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Solution

The fourth proportional to 4,078.76, 5,642.46 and 3,931.13 is: 5,438.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,078.76 : 5,642.46 = 3,931.13 : x
  2. Step 2: Convert to fraction form
    4,078.76/5,642.46 = 3,931.13/x
  3. Step 3: Cross multiply
    4,078.76x = 5,642.46 × 3,931.13
  4. Step 4: Simplify right side
    4,078.76x = 22,181,257.89
  5. Step 5: Solve for x
    x = 22,181,257.89/4,078.76
  6. Step 6: Final answer
    x = 5,438.24

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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.