Home / 28,910.52-39,889.80-21,757.95

Finding the Fourth Proportional to 28,910.52, 39,889.80 and 21,757.95

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Solution

The fourth proportional to 28,910.52, 39,889.80 and 21,757.95 is: 30,020.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,910.52 : 39,889.80 = 21,757.95 : x
  2. Step 2: Convert to fraction form
    28,910.52/39,889.80 = 21,757.95/x
  3. Step 3: Cross multiply
    28,910.52x = 39,889.80 × 21,757.95
  4. Step 4: Simplify right side
    28,910.52x = 867,920,273.91
  5. Step 5: Solve for x
    x = 867,920,273.91/28,910.52
  6. Step 6: Final answer
    x = 30,020.92

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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.