Home / 20,107.56-27,750.40-11,155.08

Finding the Fourth Proportional to 20,107.56, 27,750.40 and 11,155.08

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Solution

The fourth proportional to 20,107.56, 27,750.40 and 11,155.08 is: 15,395.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.56 : 27,750.40 = 11,155.08 : x
  2. Step 2: Convert to fraction form
    20,107.56/27,750.40 = 11,155.08/x
  3. Step 3: Cross multiply
    20,107.56x = 27,750.40 × 11,155.08
  4. Step 4: Simplify right side
    20,107.56x = 309,557,932.03
  5. Step 5: Solve for x
    x = 309,557,932.03/20,107.56
  6. Step 6: Final answer
    x = 15,395.10

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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.