Home / 8,618.85-12,902.75-5,321.34

Finding the Fourth Proportional to 8,618.85, 12,902.75 and 5,321.34

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Solution

The fourth proportional to 8,618.85, 12,902.75 and 5,321.34 is: 7,966.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.85 : 12,902.75 = 5,321.34 : x
  2. Step 2: Convert to fraction form
    8,618.85/12,902.75 = 5,321.34/x
  3. Step 3: Cross multiply
    8,618.85x = 12,902.75 × 5,321.34
  4. Step 4: Simplify right side
    8,618.85x = 68,659,868.47
  5. Step 5: Solve for x
    x = 68,659,868.47/8,618.85
  6. Step 6: Final answer
    x = 7,966.25

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1.5x scale

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.