Home / 31,287.25-43,176.41-18,712

Finding the Fourth Proportional to 31,287.25, 43,176.41 and 18,712

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Solution

The fourth proportional to 31,287.25, 43,176.41 and 18,712 is: 25,822.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,287.25 : 43,176.41 = 18,712 : x
  2. Step 2: Convert to fraction form
    31,287.25/43,176.41 = 18,712/x
  3. Step 3: Cross multiply
    31,287.25x = 43,176.41 × 18,712
  4. Step 4: Simplify right side
    31,287.25x = 807,916,983.92
  5. Step 5: Solve for x
    x = 807,916,983.92/31,287.25
  6. Step 6: Final answer
    x = 25,822.56

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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.