Home / 20,395.68-28,145.85-11,442.99

Finding the Fourth Proportional to 20,395.68, 28,145.85 and 11,442.99

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Solution

The fourth proportional to 20,395.68, 28,145.85 and 11,442.99 is: 15,791.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.68 : 28,145.85 = 11,442.99 : x
  2. Step 2: Convert to fraction form
    20,395.68/28,145.85 = 11,442.99/x
  3. Step 3: Cross multiply
    20,395.68x = 28,145.85 × 11,442.99
  4. Step 4: Simplify right side
    20,395.68x = 322,072,680.09
  5. Step 5: Solve for x
    x = 322,072,680.09/20,395.68
  6. Step 6: Final answer
    x = 15,791.22

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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.