Home / 31,390.86-43,318.35-18,806.70

Finding the Fourth Proportional to 31,390.86, 43,318.35 and 18,806.70

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Solution

The fourth proportional to 31,390.86, 43,318.35 and 18,806.70 is: 25,952.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,390.86 : 43,318.35 = 18,806.70 : x
  2. Step 2: Convert to fraction form
    31,390.86/43,318.35 = 18,806.70/x
  3. Step 3: Cross multiply
    31,390.86x = 43,318.35 × 18,806.70
  4. Step 4: Simplify right side
    31,390.86x = 814,675,212.95
  5. Step 5: Solve for x
    x = 814,675,212.95/31,390.86
  6. Step 6: Final answer
    x = 25,952.62

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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.