Home / 30,876.34-42,610.15-18,932.80

Finding the Fourth Proportional to 30,876.34, 42,610.15 and 18,932.80

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Solution

The fourth proportional to 30,876.34, 42,610.15 and 18,932.80 is: 26,127.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,876.34 : 42,610.15 = 18,932.80 : x
  2. Step 2: Convert to fraction form
    30,876.34/42,610.15 = 18,932.80/x
  3. Step 3: Cross multiply
    30,876.34x = 42,610.15 × 18,932.80
  4. Step 4: Simplify right side
    30,876.34x = 806,729,447.92
  5. Step 5: Solve for x
    x = 806,729,447.92/30,876.34
  6. Step 6: Final answer
    x = 26,127.76

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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.