Home / 21,648.08-29,877-12,218.96

Finding the Fourth Proportional to 21,648.08, 29,877 and 12,218.96

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Solution

The fourth proportional to 21,648.08, 29,877 and 12,218.96 is: 16,863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,648.08 : 29,877 = 12,218.96 : x
  2. Step 2: Convert to fraction form
    21,648.08/29,877 = 12,218.96/x
  3. Step 3: Cross multiply
    21,648.08x = 29,877 × 12,218.96
  4. Step 4: Simplify right side
    21,648.08x = 365,065,867.92
  5. Step 5: Solve for x
    x = 365,065,867.92/21,648.08
  6. Step 6: Final answer
    x = 16,863.66

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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.