Home / 31,009.72-42,778.36-18,425.56

Finding the Fourth Proportional to 31,009.72, 42,778.36 and 18,425.56

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Solution

The fourth proportional to 31,009.72, 42,778.36 and 18,425.56 is: 25,418.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,009.72 : 42,778.36 = 18,425.56 : x
  2. Step 2: Convert to fraction form
    31,009.72/42,778.36 = 18,425.56/x
  3. Step 3: Cross multiply
    31,009.72x = 42,778.36 × 18,425.56
  4. Step 4: Simplify right side
    31,009.72x = 788,215,238.88
  5. Step 5: Solve for x
    x = 788,215,238.88/31,009.72
  6. Step 6: Final answer
    x = 25,418.33

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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.