Home / 34,728.19-47,923.90-20,387.78

Finding the Fourth Proportional to 34,728.19, 47,923.90 and 20,387.78

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Solution

The fourth proportional to 34,728.19, 47,923.90 and 20,387.78 is: 28,134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,728.19 : 47,923.90 = 20,387.78 : x
  2. Step 2: Convert to fraction form
    34,728.19/47,923.90 = 20,387.78/x
  3. Step 3: Cross multiply
    34,728.19x = 47,923.90 × 20,387.78
  4. Step 4: Simplify right side
    34,728.19x = 977,061,819.07
  5. Step 5: Solve for x
    x = 977,061,819.07/34,728.19
  6. Step 6: Final answer
    x = 28,134.55

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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.