Home / 8,579.10-12,868.65-5,123.10

Finding the Fourth Proportional to 8,579.10, 12,868.65 and 5,123.10

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Solution

The fourth proportional to 8,579.10, 12,868.65 and 5,123.10 is: 7,684.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.10 : 12,868.65 = 5,123.10 : x
  2. Step 2: Convert to fraction form
    8,579.10/12,868.65 = 5,123.10/x
  3. Step 3: Cross multiply
    8,579.10x = 12,868.65 × 5,123.10
  4. Step 4: Simplify right side
    8,579.10x = 65,927,380.82
  5. Step 5: Solve for x
    x = 65,927,380.82/8,579.10
  6. Step 6: Final answer
    x = 7,684.65

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Similar ratio
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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.