Home / 8,987.76-12,406.37-5,450.90

Finding the Fourth Proportional to 8,987.76, 12,406.37 and 5,450.90

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Solution

The fourth proportional to 8,987.76, 12,406.37 and 5,450.90 is: 7,524.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.76 : 12,406.37 = 5,450.90 : x
  2. Step 2: Convert to fraction form
    8,987.76/12,406.37 = 5,450.90/x
  3. Step 3: Cross multiply
    8,987.76x = 12,406.37 × 5,450.90
  4. Step 4: Simplify right side
    8,987.76x = 67,625,792.95
  5. Step 5: Solve for x
    x = 67,625,792.95/8,987.76
  6. Step 6: Final answer
    x = 7,524.21

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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.