Home / 21,115.40-29,111.10-16,881.80

Finding the Fourth Proportional to 21,115.40, 29,111.10 and 16,881.80

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Solution

The fourth proportional to 21,115.40, 29,111.10 and 16,881.80 is: 23,274.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.40 : 29,111.10 = 16,881.80 : x
  2. Step 2: Convert to fraction form
    21,115.40/29,111.10 = 16,881.80/x
  3. Step 3: Cross multiply
    21,115.40x = 29,111.10 × 16,881.80
  4. Step 4: Simplify right side
    21,115.40x = 491,447,767.98
  5. Step 5: Solve for x
    x = 491,447,767.98/21,115.40
  6. Step 6: Final answer
    x = 23,274.38

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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.