Home / 19,878.11-27,433.35-11,382.90

Finding the Fourth Proportional to 19,878.11, 27,433.35 and 11,382.90

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Solution

The fourth proportional to 19,878.11, 27,433.35 and 11,382.90 is: 15,709.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.11 : 27,433.35 = 11,382.90 : x
  2. Step 2: Convert to fraction form
    19,878.11/27,433.35 = 11,382.90/x
  3. Step 3: Cross multiply
    19,878.11x = 27,433.35 × 11,382.90
  4. Step 4: Simplify right side
    19,878.11x = 312,270,976.84
  5. Step 5: Solve for x
    x = 312,270,976.84/19,878.11
  6. Step 6: Final answer
    x = 15,709.29

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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.