Home / 21,221.42-29,277.60-13,151.39

Finding the Fourth Proportional to 21,221.42, 29,277.60 and 13,151.39

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Solution

The fourth proportional to 21,221.42, 29,277.60 and 13,151.39 is: 18,143.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.42 : 29,277.60 = 13,151.39 : x
  2. Step 2: Convert to fraction form
    21,221.42/29,277.60 = 13,151.39/x
  3. Step 3: Cross multiply
    21,221.42x = 29,277.60 × 13,151.39
  4. Step 4: Simplify right side
    21,221.42x = 385,040,989.48
  5. Step 5: Solve for x
    x = 385,040,989.48/21,221.42
  6. Step 6: Final answer
    x = 18,143.98

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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.