Home / 31,690.28-43,742.32-18,270.50

Finding the Fourth Proportional to 31,690.28, 43,742.32 and 18,270.50

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Solution

The fourth proportional to 31,690.28, 43,742.32 and 18,270.50 is: 25,218.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.28 : 43,742.32 = 18,270.50 : x
  2. Step 2: Convert to fraction form
    31,690.28/43,742.32 = 18,270.50/x
  3. Step 3: Cross multiply
    31,690.28x = 43,742.32 × 18,270.50
  4. Step 4: Simplify right side
    31,690.28x = 799,193,793.17
  5. Step 5: Solve for x
    x = 799,193,793.17/31,690.28
  6. Step 6: Final answer
    x = 25,218.89

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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.