Home / 21,286.38-29,356.02-13,329.30

Finding the Fourth Proportional to 21,286.38, 29,356.02 and 13,329.30

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Solution

The fourth proportional to 21,286.38, 29,356.02 and 13,329.30 is: 18,382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.38 : 29,356.02 = 13,329.30 : x
  2. Step 2: Convert to fraction form
    21,286.38/29,356.02 = 13,329.30/x
  3. Step 3: Cross multiply
    21,286.38x = 29,356.02 × 13,329.30
  4. Step 4: Simplify right side
    21,286.38x = 391,295,197.39
  5. Step 5: Solve for x
    x = 391,295,197.39/21,286.38
  6. Step 6: Final answer
    x = 18,382.42

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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.