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Finding the Fourth Proportional to 8,319.16, 12,478.74 and 6,589

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Solution

The fourth proportional to 8,319.16, 12,478.74 and 6,589 is: 9,883.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.16 : 12,478.74 = 6,589 : x
  2. Step 2: Convert to fraction form
    8,319.16/12,478.74 = 6,589/x
  3. Step 3: Cross multiply
    8,319.16x = 12,478.74 × 6,589
  4. Step 4: Simplify right side
    8,319.16x = 82,222,417.86
  5. Step 5: Solve for x
    x = 82,222,417.86/8,319.16
  6. Step 6: Final answer
    x = 9,883.50

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Double scale
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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.