Home / 21,122.41-29,155.42-12,175.89

Finding the Fourth Proportional to 21,122.41, 29,155.42 and 12,175.89

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Solution

The fourth proportional to 21,122.41, 29,155.42 and 12,175.89 is: 16,806.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.41 : 29,155.42 = 12,175.89 : x
  2. Step 2: Convert to fraction form
    21,122.41/29,155.42 = 12,175.89/x
  3. Step 3: Cross multiply
    21,122.41x = 29,155.42 × 12,175.89
  4. Step 4: Simplify right side
    21,122.41x = 354,993,274.93
  5. Step 5: Solve for x
    x = 354,993,274.93/21,122.41
  6. Step 6: Final answer
    x = 16,806.48

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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.