Home / 21,105.43-29,125.79-12,154.53

Finding the Fourth Proportional to 21,105.43, 29,125.79 and 12,154.53

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Solution

The fourth proportional to 21,105.43, 29,125.79 and 12,154.53 is: 16,773.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.43 : 29,125.79 = 12,154.53 : x
  2. Step 2: Convert to fraction form
    21,105.43/29,125.79 = 12,154.53/x
  3. Step 3: Cross multiply
    21,105.43x = 29,125.79 × 12,154.53
  4. Step 4: Simplify right side
    21,105.43x = 354,010,288.33
  5. Step 5: Solve for x
    x = 354,010,288.33/21,105.43
  6. Step 6: Final answer
    x = 16,773.42

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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.