Home / 3,987.50-5,507.36-2,658.90

Finding the Fourth Proportional to 3,987.50, 5,507.36 and 2,658.90

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Solution

The fourth proportional to 3,987.50, 5,507.36 and 2,658.90 is: 3,672.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.50 : 5,507.36 = 2,658.90 : x
  2. Step 2: Convert to fraction form
    3,987.50/5,507.36 = 2,658.90/x
  3. Step 3: Cross multiply
    3,987.50x = 5,507.36 × 2,658.90
  4. Step 4: Simplify right side
    3,987.50x = 14,643,526.15
  5. Step 5: Solve for x
    x = 14,643,526.15/3,987.50
  6. Step 6: Final answer
    x = 3,672.36

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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.