Home / 21,148.56-29,171.79-13,604.71

Finding the Fourth Proportional to 21,148.56, 29,171.79 and 13,604.71

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Solution

The fourth proportional to 21,148.56, 29,171.79 and 13,604.71 is: 18,765.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.56 : 29,171.79 = 13,604.71 : x
  2. Step 2: Convert to fraction form
    21,148.56/29,171.79 = 13,604.71/x
  3. Step 3: Cross multiply
    21,148.56x = 29,171.79 × 13,604.71
  4. Step 4: Simplify right side
    21,148.56x = 396,873,743.13
  5. Step 5: Solve for x
    x = 396,873,743.13/21,148.56
  6. Step 6: Final answer
    x = 18,765.99

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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.