Home / 8,987.74-13,475.36-3,987.38

Finding the Fourth Proportional to 8,987.74, 13,475.36 and 3,987.38

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Solution

The fourth proportional to 8,987.74, 13,475.36 and 3,987.38 is: 5,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.74 : 13,475.36 = 3,987.38 : x
  2. Step 2: Convert to fraction form
    8,987.74/13,475.36 = 3,987.38/x
  3. Step 3: Cross multiply
    8,987.74x = 13,475.36 × 3,987.38
  4. Step 4: Simplify right side
    8,987.74x = 53,731,424.61
  5. Step 5: Solve for x
    x = 53,731,424.61/8,987.74
  6. Step 6: Final answer
    x = 5,978.30

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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.