Home / 28,254.41-42,381.62-20,512.43

Finding the Fourth Proportional to 28,254.41, 42,381.62 and 20,512.43

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Solution

The fourth proportional to 28,254.41, 42,381.62 and 20,512.43 is: 30,768.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.41 : 42,381.62 = 20,512.43 : x
  2. Step 2: Convert to fraction form
    28,254.41/42,381.62 = 20,512.43/x
  3. Step 3: Cross multiply
    28,254.41x = 42,381.62 × 20,512.43
  4. Step 4: Simplify right side
    28,254.41x = 869,350,013.54
  5. Step 5: Solve for x
    x = 869,350,013.54/28,254.41
  6. Step 6: Final answer
    x = 30,768.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.