Home / 21,282.09-29,369.34-11,721.75

Finding the Fourth Proportional to 21,282.09, 29,369.34 and 11,721.75

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Solution

The fourth proportional to 21,282.09, 29,369.34 and 11,721.75 is: 16,176.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.09 : 29,369.34 = 11,721.75 : x
  2. Step 2: Convert to fraction form
    21,282.09/29,369.34 = 11,721.75/x
  3. Step 3: Cross multiply
    21,282.09x = 29,369.34 × 11,721.75
  4. Step 4: Simplify right side
    21,282.09x = 344,260,061.15
  5. Step 5: Solve for x
    x = 344,260,061.15/21,282.09
  6. Step 6: Final answer
    x = 16,176.05

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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.