Home / 31,135.44-42,972.48-18,561

Finding the Fourth Proportional to 31,135.44, 42,972.48 and 18,561

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Solution

The fourth proportional to 31,135.44, 42,972.48 and 18,561 is: 25,617.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,135.44 : 42,972.48 = 18,561 : x
  2. Step 2: Convert to fraction form
    31,135.44/42,972.48 = 18,561/x
  3. Step 3: Cross multiply
    31,135.44x = 42,972.48 × 18,561
  4. Step 4: Simplify right side
    31,135.44x = 797,612,201.28
  5. Step 5: Solve for x
    x = 797,612,201.28/31,135.44
  6. Step 6: Final answer
    x = 25,617.50

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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.