Home / 21,388.39-29,511.24-13,427.71

Finding the Fourth Proportional to 21,388.39, 29,511.24 and 13,427.71

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Solution

The fourth proportional to 21,388.39, 29,511.24 and 13,427.71 is: 18,527.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.39 : 29,511.24 = 13,427.71 : x
  2. Step 2: Convert to fraction form
    21,388.39/29,511.24 = 13,427.71/x
  3. Step 3: Cross multiply
    21,388.39x = 29,511.24 × 13,427.71
  4. Step 4: Simplify right side
    21,388.39x = 396,268,248.33
  5. Step 5: Solve for x
    x = 396,268,248.33/21,388.39
  6. Step 6: Final answer
    x = 18,527.26

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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.