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Finding the Fourth Proportional to 6,808.60, 10,212.90 and 5,715.10

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Solution

The fourth proportional to 6,808.60, 10,212.90 and 5,715.10 is: 8,572.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,808.60 : 10,212.90 = 5,715.10 : x
  2. Step 2: Convert to fraction form
    6,808.60/10,212.90 = 5,715.10/x
  3. Step 3: Cross multiply
    6,808.60x = 10,212.90 × 5,715.10
  4. Step 4: Simplify right side
    6,808.60x = 58,367,744.79
  5. Step 5: Solve for x
    x = 58,367,744.79/6,808.60
  6. Step 6: Final answer
    x = 8,572.65

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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.