Home / 15,327.20-21,149.96-8,611.76

Finding the Fourth Proportional to 15,327.20, 21,149.96 and 8,611.76

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Solution

The fourth proportional to 15,327.20, 21,149.96 and 8,611.76 is: 11,883.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,327.20 : 21,149.96 = 8,611.76 : x
  2. Step 2: Convert to fraction form
    15,327.20/21,149.96 = 8,611.76/x
  3. Step 3: Cross multiply
    15,327.20x = 21,149.96 × 8,611.76
  4. Step 4: Simplify right side
    15,327.20x = 182,138,379.53
  5. Step 5: Solve for x
    x = 182,138,379.53/15,327.20
  6. Step 6: Final answer
    x = 11,883.34

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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.