Home / 20,930.95-28,884.90-11,499.52

Finding the Fourth Proportional to 20,930.95, 28,884.90 and 11,499.52

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Solution

The fourth proportional to 20,930.95, 28,884.90 and 11,499.52 is: 15,869.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.95 : 28,884.90 = 11,499.52 : x
  2. Step 2: Convert to fraction form
    20,930.95/28,884.90 = 11,499.52/x
  3. Step 3: Cross multiply
    20,930.95x = 28,884.90 × 11,499.52
  4. Step 4: Simplify right side
    20,930.95x = 332,162,485.25
  5. Step 5: Solve for x
    x = 332,162,485.25/20,930.95
  6. Step 6: Final answer
    x = 15,869.44

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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.