Home / 2,987.12-4,487.91-2,637.20

Finding the Fourth Proportional to 2,987.12, 4,487.91 and 2,637.20

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Solution

The fourth proportional to 2,987.12, 4,487.91 and 2,637.20 is: 3,962.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.12 : 4,487.91 = 2,637.20 : x
  2. Step 2: Convert to fraction form
    2,987.12/4,487.91 = 2,637.20/x
  3. Step 3: Cross multiply
    2,987.12x = 4,487.91 × 2,637.20
  4. Step 4: Simplify right side
    2,987.12x = 11,835,516.25
  5. Step 5: Solve for x
    x = 11,835,516.25/2,987.12
  6. Step 6: Final answer
    x = 3,962.18

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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.