Home / 31,756.20-43,820.39-18,331.78

Finding the Fourth Proportional to 31,756.20, 43,820.39 and 18,331.78

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Solution

The fourth proportional to 31,756.20, 43,820.39 and 18,331.78 is: 25,296.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,756.20 : 43,820.39 = 18,331.78 : x
  2. Step 2: Convert to fraction form
    31,756.20/43,820.39 = 18,331.78/x
  3. Step 3: Cross multiply
    31,756.20x = 43,820.39 × 18,331.78
  4. Step 4: Simplify right side
    31,756.20x = 803,305,748.99
  5. Step 5: Solve for x
    x = 803,305,748.99/31,756.20
  6. Step 6: Final answer
    x = 25,296.03

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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.