Home / 31,238.40-43,109.28-20,080

Finding the Fourth Proportional to 31,238.40, 43,109.28 and 20,080

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Solution

The fourth proportional to 31,238.40, 43,109.28 and 20,080 is: 27,710.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,238.40 : 43,109.28 = 20,080 : x
  2. Step 2: Convert to fraction form
    31,238.40/43,109.28 = 20,080/x
  3. Step 3: Cross multiply
    31,238.40x = 43,109.28 × 20,080
  4. Step 4: Simplify right side
    31,238.40x = 865,634,342.40
  5. Step 5: Solve for x
    x = 865,634,342.40/31,238.40
  6. Step 6: Final answer
    x = 27,710.59

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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.