Home / 20,395.09-28,144.78-11,442.43

Finding the Fourth Proportional to 20,395.09, 28,144.78 and 11,442.43

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Solution

The fourth proportional to 20,395.09, 28,144.78 and 11,442.43 is: 15,790.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.09 : 28,144.78 = 11,442.43 : x
  2. Step 2: Convert to fraction form
    20,395.09/28,144.78 = 11,442.43/x
  3. Step 3: Cross multiply
    20,395.09x = 28,144.78 × 11,442.43
  4. Step 4: Simplify right side
    20,395.09x = 322,044,681.59
  5. Step 5: Solve for x
    x = 322,044,681.59/20,395.09
  6. Step 6: Final answer
    x = 15,790.30

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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.