Home / 20,368.66-28,109.87-11,419.04

Finding the Fourth Proportional to 20,368.66, 28,109.87 and 11,419.04

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Solution

The fourth proportional to 20,368.66, 28,109.87 and 11,419.04 is: 15,758.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.66 : 28,109.87 = 11,419.04 : x
  2. Step 2: Convert to fraction form
    20,368.66/28,109.87 = 11,419.04/x
  3. Step 3: Cross multiply
    20,368.66x = 28,109.87 × 11,419.04
  4. Step 4: Simplify right side
    20,368.66x = 320,987,729.92
  5. Step 5: Solve for x
    x = 320,987,729.92/20,368.66
  6. Step 6: Final answer
    x = 15,758.90

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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.