Home / 8,987.28-12,401.55-5,450.28

Finding the Fourth Proportional to 8,987.28, 12,401.55 and 5,450.28

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Solution

The fourth proportional to 8,987.28, 12,401.55 and 5,450.28 is: 7,520.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.28 : 12,401.55 = 5,450.28 : x
  2. Step 2: Convert to fraction form
    8,987.28/12,401.55 = 5,450.28/x
  3. Step 3: Cross multiply
    8,987.28x = 12,401.55 × 5,450.28
  4. Step 4: Simplify right side
    8,987.28x = 67,591,919.93
  5. Step 5: Solve for x
    x = 67,591,919.93/8,987.28
  6. Step 6: Final answer
    x = 7,520.84

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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.