Home / 20,729.88-28,689.45-20,232.42

Finding the Fourth Proportional to 20,729.88, 28,689.45 and 20,232.42

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Solution

The fourth proportional to 20,729.88, 28,689.45 and 20,232.42 is: 28,000.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.88 : 28,689.45 = 20,232.42 : x
  2. Step 2: Convert to fraction form
    20,729.88/28,689.45 = 20,232.42/x
  3. Step 3: Cross multiply
    20,729.88x = 28,689.45 × 20,232.42
  4. Step 4: Simplify right side
    20,729.88x = 580,456,915.07
  5. Step 5: Solve for x
    x = 580,456,915.07/20,729.88
  6. Step 6: Final answer
    x = 28,000.98

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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.