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Finding the Fourth Proportional to 19,998.88, 27,600.80 and 12,045.12

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Solution

The fourth proportional to 19,998.88, 27,600.80 and 12,045.12 is: 16,623.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.88 : 27,600.80 = 12,045.12 : x
  2. Step 2: Convert to fraction form
    19,998.88/27,600.80 = 12,045.12/x
  3. Step 3: Cross multiply
    19,998.88x = 27,600.80 × 12,045.12
  4. Step 4: Simplify right side
    19,998.88x = 332,454,948.10
  5. Step 5: Solve for x
    x = 332,454,948.10/19,998.88
  6. Step 6: Final answer
    x = 16,623.68

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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.