Home / 21,074.05-29,083.02-12,121.55

Finding the Fourth Proportional to 21,074.05, 29,083.02 and 12,121.55

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Solution

The fourth proportional to 21,074.05, 29,083.02 and 12,121.55 is: 16,728.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.05 : 29,083.02 = 12,121.55 : x
  2. Step 2: Convert to fraction form
    21,074.05/29,083.02 = 12,121.55/x
  3. Step 3: Cross multiply
    21,074.05x = 29,083.02 × 12,121.55
  4. Step 4: Simplify right side
    21,074.05x = 352,531,135.67
  5. Step 5: Solve for x
    x = 352,531,135.67/21,074.05
  6. Step 6: Final answer
    x = 16,728.21

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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.