Home / 20,930.60-28,876.05-11,973.31

Finding the Fourth Proportional to 20,930.60, 28,876.05 and 11,973.31

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Solution

The fourth proportional to 20,930.60, 28,876.05 and 11,973.31 is: 16,518.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.60 : 28,876.05 = 11,973.31 : x
  2. Step 2: Convert to fraction form
    20,930.60/28,876.05 = 11,973.31/x
  3. Step 3: Cross multiply
    20,930.60x = 28,876.05 × 11,973.31
  4. Step 4: Simplify right side
    20,930.60x = 345,741,826.04
  5. Step 5: Solve for x
    x = 345,741,826.04/20,930.60
  6. Step 6: Final answer
    x = 16,518.48

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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.