Home / 27,815.28-38,418.80-20,249.64

Finding the Fourth Proportional to 27,815.28, 38,418.80 and 20,249.64

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Solution

The fourth proportional to 27,815.28, 38,418.80 and 20,249.64 is: 27,969.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,815.28 : 38,418.80 = 20,249.64 : x
  2. Step 2: Convert to fraction form
    27,815.28/38,418.80 = 20,249.64/x
  3. Step 3: Cross multiply
    27,815.28x = 38,418.80 × 20,249.64
  4. Step 4: Simplify right side
    27,815.28x = 777,966,869.23
  5. Step 5: Solve for x
    x = 777,966,869.23/27,815.28
  6. Step 6: Final answer
    x = 27,969.05

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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.