Home / 20,949.03-28,909.77-11,518.20

Finding the Fourth Proportional to 20,949.03, 28,909.77 and 11,518.20

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Solution

The fourth proportional to 20,949.03, 28,909.77 and 11,518.20 is: 15,895.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.03 : 28,909.77 = 11,518.20 : x
  2. Step 2: Convert to fraction form
    20,949.03/28,909.77 = 11,518.20/x
  3. Step 3: Cross multiply
    20,949.03x = 28,909.77 × 11,518.20
  4. Step 4: Simplify right side
    20,949.03x = 332,988,512.81
  5. Step 5: Solve for x
    x = 332,988,512.81/20,949.03
  6. Step 6: Final answer
    x = 15,895.18

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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.