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Finding the Fourth Proportional to 8,993.12, 12,392.96 and 6,470.78

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Solution

The fourth proportional to 8,993.12, 12,392.96 and 6,470.78 is: 8,917.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,993.12 : 12,392.96 = 6,470.78 : x
  2. Step 2: Convert to fraction form
    8,993.12/12,392.96 = 6,470.78/x
  3. Step 3: Cross multiply
    8,993.12x = 12,392.96 × 6,470.78
  4. Step 4: Simplify right side
    8,993.12x = 80,192,023.39
  5. Step 5: Solve for x
    x = 80,192,023.39/8,993.12
  6. Step 6: Final answer
    x = 8,917.05

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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.