Home / 20,949.60-28,909.70-11,518.08

Finding the Fourth Proportional to 20,949.60, 28,909.70 and 11,518.08

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Solution

The fourth proportional to 20,949.60, 28,909.70 and 11,518.08 is: 15,894.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.60 : 28,909.70 = 11,518.08 : x
  2. Step 2: Convert to fraction form
    20,949.60/28,909.70 = 11,518.08/x
  3. Step 3: Cross multiply
    20,949.60x = 28,909.70 × 11,518.08
  4. Step 4: Simplify right side
    20,949.60x = 332,984,237.38
  5. Step 5: Solve for x
    x = 332,984,237.38/20,949.60
  6. Step 6: Final answer
    x = 15,894.54

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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.