Home / 3,987.80-5,502.24-2,415.56

Finding the Fourth Proportional to 3,987.80, 5,502.24 and 2,415.56

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Solution

The fourth proportional to 3,987.80, 5,502.24 and 2,415.56 is: 3,332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.80 : 5,502.24 = 2,415.56 : x
  2. Step 2: Convert to fraction form
    3,987.80/5,502.24 = 2,415.56/x
  3. Step 3: Cross multiply
    3,987.80x = 5,502.24 × 2,415.56
  4. Step 4: Simplify right side
    3,987.80x = 13,290,990.85
  5. Step 5: Solve for x
    x = 13,290,990.85/3,987.80
  6. Step 6: Final answer
    x = 3,332.91

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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.