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Finding the Fourth Proportional to 8,579.64, 12,812.37 and 8,486.87

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Solution

The fourth proportional to 8,579.64, 12,812.37 and 8,486.87 is: 12,673.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.64 : 12,812.37 = 8,486.87 : x
  2. Step 2: Convert to fraction form
    8,579.64/12,812.37 = 8,486.87/x
  3. Step 3: Cross multiply
    8,579.64x = 12,812.37 × 8,486.87
  4. Step 4: Simplify right side
    8,579.64x = 108,736,902.57
  5. Step 5: Solve for x
    x = 108,736,902.57/8,579.64
  6. Step 6: Final answer
    x = 12,673.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.