Home / 31,781.52-43,848.36-18,351

Finding the Fourth Proportional to 31,781.52, 43,848.36 and 18,351

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Solution

The fourth proportional to 31,781.52, 43,848.36 and 18,351 is: 25,318.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,781.52 : 43,848.36 = 18,351 : x
  2. Step 2: Convert to fraction form
    31,781.52/43,848.36 = 18,351/x
  3. Step 3: Cross multiply
    31,781.52x = 43,848.36 × 18,351
  4. Step 4: Simplify right side
    31,781.52x = 804,661,254.36
  5. Step 5: Solve for x
    x = 804,661,254.36/31,781.52
  6. Step 6: Final answer
    x = 25,318.53

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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.