Home / 20,230.47-27,918.05-11,277.78

Finding the Fourth Proportional to 20,230.47, 27,918.05 and 11,277.78

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Solution

The fourth proportional to 20,230.47, 27,918.05 and 11,277.78 is: 15,563.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,230.47 : 27,918.05 = 11,277.78 : x
  2. Step 2: Convert to fraction form
    20,230.47/27,918.05 = 11,277.78/x
  3. Step 3: Cross multiply
    20,230.47x = 27,918.05 × 11,277.78
  4. Step 4: Simplify right side
    20,230.47x = 314,853,429.95
  5. Step 5: Solve for x
    x = 314,853,429.95/20,230.47
  6. Step 6: Final answer
    x = 15,563.33

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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.