Home / 20,138.87-27,787.61-11,185.13

Finding the Fourth Proportional to 20,138.87, 27,787.61 and 11,185.13

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Solution

The fourth proportional to 20,138.87, 27,787.61 and 11,185.13 is: 15,433.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.87 : 27,787.61 = 11,185.13 : x
  2. Step 2: Convert to fraction form
    20,138.87/27,787.61 = 11,185.13/x
  3. Step 3: Cross multiply
    20,138.87x = 27,787.61 × 11,185.13
  4. Step 4: Simplify right side
    20,138.87x = 310,807,974.31
  5. Step 5: Solve for x
    x = 310,807,974.31/20,138.87
  6. Step 6: Final answer
    x = 15,433.24

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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.