Home / 20,876.87-28,810.04-11,445.50

Finding the Fourth Proportional to 20,876.87, 28,810.04 and 11,445.50

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Solution

The fourth proportional to 20,876.87, 28,810.04 and 11,445.50 is: 15,794.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.87 : 28,810.04 = 11,445.50 : x
  2. Step 2: Convert to fraction form
    20,876.87/28,810.04 = 11,445.50/x
  3. Step 3: Cross multiply
    20,876.87x = 28,810.04 × 11,445.50
  4. Step 4: Simplify right side
    20,876.87x = 329,745,327.62
  5. Step 5: Solve for x
    x = 329,745,327.62/20,876.87
  6. Step 6: Final answer
    x = 15,794.77

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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.