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Finding the Fourth Proportional to 8,657.59, 12,987.44 and 3,392.68

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Solution

The fourth proportional to 8,657.59, 12,987.44 and 3,392.68 is: 5,089.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.59 : 12,987.44 = 3,392.68 : x
  2. Step 2: Convert to fraction form
    8,657.59/12,987.44 = 3,392.68/x
  3. Step 3: Cross multiply
    8,657.59x = 12,987.44 × 3,392.68
  4. Step 4: Simplify right side
    8,657.59x = 44,062,227.94
  5. Step 5: Solve for x
    x = 44,062,227.94/8,657.59
  6. Step 6: Final answer
    x = 5,089.43

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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.