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Finding the Fourth Proportional to 28,065.17, 38,728.97 and 16,728.82

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Solution

The fourth proportional to 28,065.17, 38,728.97 and 16,728.82 is: 23,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.17 : 38,728.97 = 16,728.82 : x
  2. Step 2: Convert to fraction form
    28,065.17/38,728.97 = 16,728.82/x
  3. Step 3: Cross multiply
    28,065.17x = 38,728.97 × 16,728.82
  4. Step 4: Simplify right side
    28,065.17x = 647,889,959.11
  5. Step 5: Solve for x
    x = 647,889,959.11/28,065.17
  6. Step 6: Final answer
    x = 23,085.20

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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.