Home / 21,988.26-30,343.82-11,916.72

Finding the Fourth Proportional to 21,988.26, 30,343.82 and 11,916.72

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Solution

The fourth proportional to 21,988.26, 30,343.82 and 11,916.72 is: 16,445.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.26 : 30,343.82 = 11,916.72 : x
  2. Step 2: Convert to fraction form
    21,988.26/30,343.82 = 11,916.72/x
  3. Step 3: Cross multiply
    21,988.26x = 30,343.82 × 11,916.72
  4. Step 4: Simplify right side
    21,988.26x = 361,598,747.09
  5. Step 5: Solve for x
    x = 361,598,747.09/21,988.26
  6. Step 6: Final answer
    x = 16,445.08

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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.