Home / 28,121.76-38,805.12-17,512.56

Finding the Fourth Proportional to 28,121.76, 38,805.12 and 17,512.56

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Solution

The fourth proportional to 28,121.76, 38,805.12 and 17,512.56 is: 24,165.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.76 : 38,805.12 = 17,512.56 : x
  2. Step 2: Convert to fraction form
    28,121.76/38,805.12 = 17,512.56/x
  3. Step 3: Cross multiply
    28,121.76x = 38,805.12 × 17,512.56
  4. Step 4: Simplify right side
    28,121.76x = 679,576,992.31
  5. Step 5: Solve for x
    x = 679,576,992.31/28,121.76
  6. Step 6: Final answer
    x = 24,165.52

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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.