Home / 20,876.30-28,809.06-11,444.80

Finding the Fourth Proportional to 20,876.30, 28,809.06 and 11,444.80

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Solution

The fourth proportional to 20,876.30, 28,809.06 and 11,444.80 is: 15,793.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.30 : 28,809.06 = 11,444.80 : x
  2. Step 2: Convert to fraction form
    20,876.30/28,809.06 = 11,444.80/x
  3. Step 3: Cross multiply
    20,876.30x = 28,809.06 × 11,444.80
  4. Step 4: Simplify right side
    20,876.30x = 329,713,929.89
  5. Step 5: Solve for x
    x = 329,713,929.89/20,876.30
  6. Step 6: Final answer
    x = 15,793.70

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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.