Home / 21,147.04-29,169.72-13,603.21

Finding the Fourth Proportional to 21,147.04, 29,169.72 and 13,603.21

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Solution

The fourth proportional to 21,147.04, 29,169.72 and 13,603.21 is: 18,763.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.04 : 29,169.72 = 13,603.21 : x
  2. Step 2: Convert to fraction form
    21,147.04/29,169.72 = 13,603.21/x
  3. Step 3: Cross multiply
    21,147.04x = 29,169.72 × 13,603.21
  4. Step 4: Simplify right side
    21,147.04x = 396,801,753.88
  5. Step 5: Solve for x
    x = 396,801,753.88/21,147.04
  6. Step 6: Final answer
    x = 18,763.94

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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.