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Finding the Fourth Proportional to 28,019.46, 38,671.11 and 15,923.46

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Solution

The fourth proportional to 28,019.46, 38,671.11 and 15,923.46 is: 21,976.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.46 : 38,671.11 = 15,923.46 : x
  2. Step 2: Convert to fraction form
    28,019.46/38,671.11 = 15,923.46/x
  3. Step 3: Cross multiply
    28,019.46x = 38,671.11 × 15,923.46
  4. Step 4: Simplify right side
    28,019.46x = 615,777,873.24
  5. Step 5: Solve for x
    x = 615,777,873.24/28,019.46
  6. Step 6: Final answer
    x = 21,976.79

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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.