Home / 31,339-43,246.38-18,770.68

Finding the Fourth Proportional to 31,339, 43,246.38 and 18,770.68

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Solution

The fourth proportional to 31,339, 43,246.38 and 18,770.68 is: 25,902.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,339 : 43,246.38 = 18,770.68 : x
  2. Step 2: Convert to fraction form
    31,339/43,246.38 = 18,770.68/x
  3. Step 3: Cross multiply
    31,339x = 43,246.38 × 18,770.68
  4. Step 4: Simplify right side
    31,339x = 811,763,960.14
  5. Step 5: Solve for x
    x = 811,763,960.14/31,339
  6. Step 6: Final answer
    x = 25,902.68

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Double scale
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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.