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Finding the Fourth Proportional to 8,605.46, 11,859.29 and 6,211.20

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Solution

The fourth proportional to 8,605.46, 11,859.29 and 6,211.20 is: 8,559.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.46 : 11,859.29 = 6,211.20 : x
  2. Step 2: Convert to fraction form
    8,605.46/11,859.29 = 6,211.20/x
  3. Step 3: Cross multiply
    8,605.46x = 11,859.29 × 6,211.20
  4. Step 4: Simplify right side
    8,605.46x = 73,660,422.05
  5. Step 5: Solve for x
    x = 73,660,422.05/8,605.46
  6. Step 6: Final answer
    x = 8,559.73

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Half scale
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Double scale
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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.