Home / 21,147.67-29,170.58-13,603.84

Finding the Fourth Proportional to 21,147.67, 29,170.58 and 13,603.84

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Solution

The fourth proportional to 21,147.67, 29,170.58 and 13,603.84 is: 18,764.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.67 : 29,170.58 = 13,603.84 : x
  2. Step 2: Convert to fraction form
    21,147.67/29,170.58 = 13,603.84/x
  3. Step 3: Cross multiply
    21,147.67x = 29,170.58 × 13,603.84
  4. Step 4: Simplify right side
    21,147.67x = 396,831,791.18
  5. Step 5: Solve for x
    x = 396,831,791.18/21,147.67
  6. Step 6: Final answer
    x = 18,764.80

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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.