Home / 31,108.44-42,900.76-20,479.62

Finding the Fourth Proportional to 31,108.44, 42,900.76 and 20,479.62

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Solution

The fourth proportional to 31,108.44, 42,900.76 and 20,479.62 is: 28,242.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.44 : 42,900.76 = 20,479.62 : x
  2. Step 2: Convert to fraction form
    31,108.44/42,900.76 = 20,479.62/x
  3. Step 3: Cross multiply
    31,108.44x = 42,900.76 × 20,479.62
  4. Step 4: Simplify right side
    31,108.44x = 878,591,262.51
  5. Step 5: Solve for x
    x = 878,591,262.51/31,108.44
  6. Step 6: Final answer
    x = 28,242.86

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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.