Home / 31,408.78-43,343.20-17,979.59

Finding the Fourth Proportional to 31,408.78, 43,343.20 and 17,979.59

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Solution

The fourth proportional to 31,408.78, 43,343.20 and 17,979.59 is: 24,811.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,408.78 : 43,343.20 = 17,979.59 : x
  2. Step 2: Convert to fraction form
    31,408.78/43,343.20 = 17,979.59/x
  3. Step 3: Cross multiply
    31,408.78x = 43,343.20 × 17,979.59
  4. Step 4: Simplify right side
    31,408.78x = 779,292,965.29
  5. Step 5: Solve for x
    x = 779,292,965.29/31,408.78
  6. Step 6: Final answer
    x = 24,811.31

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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.