Home / 20,949.16-28,909.94-11,518.34

Finding the Fourth Proportional to 20,949.16, 28,909.94 and 11,518.34

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Solution

The fourth proportional to 20,949.16, 28,909.94 and 11,518.34 is: 15,895.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.16 : 28,909.94 = 11,518.34 : x
  2. Step 2: Convert to fraction form
    20,949.16/28,909.94 = 11,518.34/x
  3. Step 3: Cross multiply
    20,949.16x = 28,909.94 × 11,518.34
  4. Step 4: Simplify right side
    20,949.16x = 332,994,518.30
  5. Step 5: Solve for x
    x = 332,994,518.30/20,949.16
  6. Step 6: Final answer
    x = 15,895.36

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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.