Home / 20,876.72-28,809.87-11,445.29

Finding the Fourth Proportional to 20,876.72, 28,809.87 and 11,445.29

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Solution

The fourth proportional to 20,876.72, 28,809.87 and 11,445.29 is: 15,794.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.72 : 28,809.87 = 11,445.29 : x
  2. Step 2: Convert to fraction form
    20,876.72/28,809.87 = 11,445.29/x
  3. Step 3: Cross multiply
    20,876.72x = 28,809.87 × 11,445.29
  4. Step 4: Simplify right side
    20,876.72x = 329,737,172.96
  5. Step 5: Solve for x
    x = 329,737,172.96/20,876.72
  6. Step 6: Final answer
    x = 15,794.50

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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.