Home / 20,439.47-28,206.80-11,241.42

Finding the Fourth Proportional to 20,439.47, 28,206.80 and 11,241.42

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Solution

The fourth proportional to 20,439.47, 28,206.80 and 11,241.42 is: 15,513.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.47 : 28,206.80 = 11,241.42 : x
  2. Step 2: Convert to fraction form
    20,439.47/28,206.80 = 11,241.42/x
  3. Step 3: Cross multiply
    20,439.47x = 28,206.80 × 11,241.42
  4. Step 4: Simplify right side
    20,439.47x = 317,084,365.83
  5. Step 5: Solve for x
    x = 317,084,365.83/20,439.47
  6. Step 6: Final answer
    x = 15,513.33

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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.