Home / 31,375.87-43,283.50-20,774.39

Finding the Fourth Proportional to 31,375.87, 43,283.50 and 20,774.39

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Solution

The fourth proportional to 31,375.87, 43,283.50 and 20,774.39 is: 28,658.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,375.87 : 43,283.50 = 20,774.39 : x
  2. Step 2: Convert to fraction form
    31,375.87/43,283.50 = 20,774.39/x
  3. Step 3: Cross multiply
    31,375.87x = 43,283.50 × 20,774.39
  4. Step 4: Simplify right side
    31,375.87x = 899,188,041.21
  5. Step 5: Solve for x
    x = 899,188,041.21/31,375.87
  6. Step 6: Final answer
    x = 28,658.59

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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.