Home / 20,340.12-28,067.58-11,955

Finding the Fourth Proportional to 20,340.12, 28,067.58 and 11,955

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Solution

The fourth proportional to 20,340.12, 28,067.58 and 11,955 is: 16,496.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.12 : 28,067.58 = 11,955 : x
  2. Step 2: Convert to fraction form
    20,340.12/28,067.58 = 11,955/x
  3. Step 3: Cross multiply
    20,340.12x = 28,067.58 × 11,955
  4. Step 4: Simplify right side
    20,340.12x = 335,547,918.90
  5. Step 5: Solve for x
    x = 335,547,918.90/20,340.12
  6. Step 6: Final answer
    x = 16,496.85

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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.