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Finding the Fourth Proportional to 13,479.98, 18,597.96 and 8,172.86

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Solution

The fourth proportional to 13,479.98, 18,597.96 and 8,172.86 is: 11,275.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.98 : 18,597.96 = 8,172.86 : x
  2. Step 2: Convert to fraction form
    13,479.98/18,597.96 = 8,172.86/x
  3. Step 3: Cross multiply
    13,479.98x = 18,597.96 × 8,172.86
  4. Step 4: Simplify right side
    13,479.98x = 151,998,569.86
  5. Step 5: Solve for x
    x = 151,998,569.86/13,479.98
  6. Step 6: Final answer
    x = 11,275.87

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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.