Home / 3,987.20-5,973.12-3,117.44

Finding the Fourth Proportional to 3,987.20, 5,973.12 and 3,117.44

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Solution

The fourth proportional to 3,987.20, 5,973.12 and 3,117.44 is: 4,670.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.20 : 5,973.12 = 3,117.44 : x
  2. Step 2: Convert to fraction form
    3,987.20/5,973.12 = 3,117.44/x
  3. Step 3: Cross multiply
    3,987.20x = 5,973.12 × 3,117.44
  4. Step 4: Simplify right side
    3,987.20x = 18,620,843.21
  5. Step 5: Solve for x
    x = 18,620,843.21/3,987.20
  6. Step 6: Final answer
    x = 4,670.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.