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Finding the Fourth Proportional to 28,168.71, 38,873.43 and 15,422.43

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Solution

The fourth proportional to 28,168.71, 38,873.43 and 15,422.43 is: 21,283.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,168.71 : 38,873.43 = 15,422.43 : x
  2. Step 2: Convert to fraction form
    28,168.71/38,873.43 = 15,422.43/x
  3. Step 3: Cross multiply
    28,168.71x = 38,873.43 × 15,422.43
  4. Step 4: Simplify right side
    28,168.71x = 599,522,753.03
  5. Step 5: Solve for x
    x = 599,522,753.03/28,168.71
  6. Step 6: Final answer
    x = 21,283.29

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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.