Home / 31,231.38-43,086.24-20,478.84

Finding the Fourth Proportional to 31,231.38, 43,086.24 and 20,478.84

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Solution

The fourth proportional to 31,231.38, 43,086.24 and 20,478.84 is: 28,252.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,231.38 : 43,086.24 = 20,478.84 : x
  2. Step 2: Convert to fraction form
    31,231.38/43,086.24 = 20,478.84/x
  3. Step 3: Cross multiply
    31,231.38x = 43,086.24 × 20,478.84
  4. Step 4: Simplify right side
    31,231.38x = 882,356,215.16
  5. Step 5: Solve for x
    x = 882,356,215.16/31,231.38
  6. Step 6: Final answer
    x = 28,252.23

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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.