Home / 20,876.50-28,809.66-11,445.22

Finding the Fourth Proportional to 20,876.50, 28,809.66 and 11,445.22

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Solution

The fourth proportional to 20,876.50, 28,809.66 and 11,445.22 is: 15,794.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.50 : 28,809.66 = 11,445.22 : x
  2. Step 2: Convert to fraction form
    20,876.50/28,809.66 = 11,445.22/x
  3. Step 3: Cross multiply
    20,876.50x = 28,809.66 × 11,445.22
  4. Step 4: Simplify right side
    20,876.50x = 329,732,896.83
  5. Step 5: Solve for x
    x = 329,732,896.83/20,876.50
  6. Step 6: Final answer
    x = 15,794.45

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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.