Home / 21,162.06-29,197.85-13,205.56

Finding the Fourth Proportional to 21,162.06, 29,197.85 and 13,205.56

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Solution

The fourth proportional to 21,162.06, 29,197.85 and 13,205.56 is: 18,220.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,162.06 : 29,197.85 = 13,205.56 : x
  2. Step 2: Convert to fraction form
    21,162.06/29,197.85 = 13,205.56/x
  3. Step 3: Cross multiply
    21,162.06x = 29,197.85 × 13,205.56
  4. Step 4: Simplify right side
    21,162.06x = 385,573,960.05
  5. Step 5: Solve for x
    x = 385,573,960.05/21,162.06
  6. Step 6: Final answer
    x = 18,220.06

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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.