Home / 21,988.55-30,344.30-11,916.97

Finding the Fourth Proportional to 21,988.55, 30,344.30 and 11,916.97

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Solution

The fourth proportional to 21,988.55, 30,344.30 and 11,916.97 is: 16,445.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.55 : 30,344.30 = 11,916.97 : x
  2. Step 2: Convert to fraction form
    21,988.55/30,344.30 = 11,916.97/x
  3. Step 3: Cross multiply
    21,988.55x = 30,344.30 × 11,916.97
  4. Step 4: Simplify right side
    21,988.55x = 361,611,977.33
  5. Step 5: Solve for x
    x = 361,611,977.33/21,988.55
  6. Step 6: Final answer
    x = 16,445.47

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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.