Home / 31,003.38-42,770.85-20,657.94

Finding the Fourth Proportional to 31,003.38, 42,770.85 and 20,657.94

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Solution

The fourth proportional to 31,003.38, 42,770.85 and 20,657.94 is: 28,498.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.38 : 42,770.85 = 20,657.94 : x
  2. Step 2: Convert to fraction form
    31,003.38/42,770.85 = 20,657.94/x
  3. Step 3: Cross multiply
    31,003.38x = 42,770.85 × 20,657.94
  4. Step 4: Simplify right side
    31,003.38x = 883,557,653.05
  5. Step 5: Solve for x
    x = 883,557,653.05/31,003.38
  6. Step 6: Final answer
    x = 28,498.75

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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.