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Finding the Fourth Proportional to 36,361.92, 54,552.72 and 12,990.24

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Solution

The fourth proportional to 36,361.92, 54,552.72 and 12,990.24 is: 19,488.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,361.92 : 54,552.72 = 12,990.24 : x
  2. Step 2: Convert to fraction form
    36,361.92/54,552.72 = 12,990.24/x
  3. Step 3: Cross multiply
    36,361.92x = 54,552.72 × 12,990.24
  4. Step 4: Simplify right side
    36,361.92x = 708,652,925.45
  5. Step 5: Solve for x
    x = 708,652,925.45/36,361.92
  6. Step 6: Final answer
    x = 19,488.88

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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.