Home / 8,928.57-12,321.21-5,151.75

Finding the Fourth Proportional to 8,928.57, 12,321.21 and 5,151.75

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Solution

The fourth proportional to 8,928.57, 12,321.21 and 5,151.75 is: 7,109.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.57 : 12,321.21 = 5,151.75 : x
  2. Step 2: Convert to fraction form
    8,928.57/12,321.21 = 5,151.75/x
  3. Step 3: Cross multiply
    8,928.57x = 12,321.21 × 5,151.75
  4. Step 4: Simplify right side
    8,928.57x = 63,475,793.62
  5. Step 5: Solve for x
    x = 63,475,793.62/8,928.57
  6. Step 6: Final answer
    x = 7,109.29

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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.