Home / 20,107.61-27,751.85-11,158.01

Finding the Fourth Proportional to 20,107.61, 27,751.85 and 11,158.01

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Solution

The fourth proportional to 20,107.61, 27,751.85 and 11,158.01 is: 15,399.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.61 : 27,751.85 = 11,158.01 : x
  2. Step 2: Convert to fraction form
    20,107.61/27,751.85 = 11,158.01/x
  3. Step 3: Cross multiply
    20,107.61x = 27,751.85 × 11,158.01
  4. Step 4: Simplify right side
    20,107.61x = 309,655,419.82
  5. Step 5: Solve for x
    x = 309,655,419.82/20,107.61
  6. Step 6: Final answer
    x = 15,399.91

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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.