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Finding the Fourth Proportional to 12,612.70, 18,897.18 and 8,393.61

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Solution

The fourth proportional to 12,612.70, 18,897.18 and 8,393.61 is: 12,575.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.70 : 18,897.18 = 8,393.61 : x
  2. Step 2: Convert to fraction form
    12,612.70/18,897.18 = 8,393.61/x
  3. Step 3: Cross multiply
    12,612.70x = 18,897.18 × 8,393.61
  4. Step 4: Simplify right side
    12,612.70x = 158,615,559.02
  5. Step 5: Solve for x
    x = 158,615,559.02/12,612.70
  6. Step 6: Final answer
    x = 12,575.86

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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.