Home / 21,147.56-29,170.41-13,603.71

Finding the Fourth Proportional to 21,147.56, 29,170.41 and 13,603.71

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Solution

The fourth proportional to 21,147.56, 29,170.41 and 13,603.71 is: 18,764.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.56 : 29,170.41 = 13,603.71 : x
  2. Step 2: Convert to fraction form
    21,147.56/29,170.41 = 13,603.71/x
  3. Step 3: Cross multiply
    21,147.56x = 29,170.41 × 13,603.71
  4. Step 4: Simplify right side
    21,147.56x = 396,825,798.22
  5. Step 5: Solve for x
    x = 396,825,798.22/21,147.56
  6. Step 6: Final answer
    x = 18,764.62

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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.