Home / 28,478.28-42,732.18-20,211.48

Finding the Fourth Proportional to 28,478.28, 42,732.18 and 20,211.48

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Solution

The fourth proportional to 28,478.28, 42,732.18 and 20,211.48 is: 30,327.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.28 : 42,732.18 = 20,211.48 : x
  2. Step 2: Convert to fraction form
    28,478.28/42,732.18 = 20,211.48/x
  3. Step 3: Cross multiply
    28,478.28x = 42,732.18 × 20,211.48
  4. Step 4: Simplify right side
    28,478.28x = 863,680,601.43
  5. Step 5: Solve for x
    x = 863,680,601.43/28,478.28
  6. Step 6: Final answer
    x = 30,327.70

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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.