Home / 20,111.28-27,754.02-11,158.65

Finding the Fourth Proportional to 20,111.28, 27,754.02 and 11,158.65

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Solution

The fourth proportional to 20,111.28, 27,754.02 and 11,158.65 is: 15,399.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.28 : 27,754.02 = 11,158.65 : x
  2. Step 2: Convert to fraction form
    20,111.28/27,754.02 = 11,158.65/x
  3. Step 3: Cross multiply
    20,111.28x = 27,754.02 × 11,158.65
  4. Step 4: Simplify right side
    20,111.28x = 309,697,395.27
  5. Step 5: Solve for x
    x = 309,697,395.27/20,111.28
  6. Step 6: Final answer
    x = 15,399.19

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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.