Home / 21,131.40-29,125.90-16,868.80

Finding the Fourth Proportional to 21,131.40, 29,125.90 and 16,868.80

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Solution

The fourth proportional to 21,131.40, 29,125.90 and 16,868.80 is: 23,250.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.40 : 29,125.90 = 16,868.80 : x
  2. Step 2: Convert to fraction form
    21,131.40/29,125.90 = 16,868.80/x
  3. Step 3: Cross multiply
    21,131.40x = 29,125.90 × 16,868.80
  4. Step 4: Simplify right side
    21,131.40x = 491,318,751.95
  5. Step 5: Solve for x
    x = 491,318,751.95/21,131.40
  6. Step 6: Final answer
    x = 23,250.65

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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.