Home / 31,697.87-43,755.80-20,800.94

Finding the Fourth Proportional to 31,697.87, 43,755.80 and 20,800.94

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Solution

The fourth proportional to 31,697.87, 43,755.80 and 20,800.94 is: 28,713.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,697.87 : 43,755.80 = 20,800.94 : x
  2. Step 2: Convert to fraction form
    31,697.87/43,755.80 = 20,800.94/x
  3. Step 3: Cross multiply
    31,697.87x = 43,755.80 × 20,800.94
  4. Step 4: Simplify right side
    31,697.87x = 910,161,447.67
  5. Step 5: Solve for x
    x = 910,161,447.67/31,697.87
  6. Step 6: Final answer
    x = 28,713.65

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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.