Home / 31,189.86-43,042.59-18,621.90

Finding the Fourth Proportional to 31,189.86, 43,042.59 and 18,621.90

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Solution

The fourth proportional to 31,189.86, 43,042.59 and 18,621.90 is: 25,698.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,189.86 : 43,042.59 = 18,621.90 : x
  2. Step 2: Convert to fraction form
    31,189.86/43,042.59 = 18,621.90/x
  3. Step 3: Cross multiply
    31,189.86x = 43,042.59 × 18,621.90
  4. Step 4: Simplify right side
    31,189.86x = 801,534,806.72
  5. Step 5: Solve for x
    x = 801,534,806.72/31,189.86
  6. Step 6: Final answer
    x = 25,698.57

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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.