Home / 30,761.24-42,455.25-18,663.71

Finding the Fourth Proportional to 30,761.24, 42,455.25 and 18,663.71

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Solution

The fourth proportional to 30,761.24, 42,455.25 and 18,663.71 is: 25,758.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,761.24 : 42,455.25 = 18,663.71 : x
  2. Step 2: Convert to fraction form
    30,761.24/42,455.25 = 18,663.71/x
  3. Step 3: Cross multiply
    30,761.24x = 42,455.25 × 18,663.71
  4. Step 4: Simplify right side
    30,761.24x = 792,372,261.70
  5. Step 5: Solve for x
    x = 792,372,261.70/30,761.24
  6. Step 6: Final answer
    x = 25,758.79

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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.