Home / 20,976.60-28,948.01-11,416.80

Finding the Fourth Proportional to 20,976.60, 28,948.01 and 11,416.80

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Solution

The fourth proportional to 20,976.60, 28,948.01 and 11,416.80 is: 15,755.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.60 : 28,948.01 = 11,416.80 : x
  2. Step 2: Convert to fraction form
    20,976.60/28,948.01 = 11,416.80/x
  3. Step 3: Cross multiply
    20,976.60x = 28,948.01 × 11,416.80
  4. Step 4: Simplify right side
    20,976.60x = 330,493,583.48
  5. Step 5: Solve for x
    x = 330,493,583.48/20,976.60
  6. Step 6: Final answer
    x = 15,755.35

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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.