Home / 20,369.79-28,109.43-11,872.22

Finding the Fourth Proportional to 20,369.79, 28,109.43 and 11,872.22

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Solution

The fourth proportional to 20,369.79, 28,109.43 and 11,872.22 is: 16,383.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.79 : 28,109.43 = 11,872.22 : x
  2. Step 2: Convert to fraction form
    20,369.79/28,109.43 = 11,872.22/x
  3. Step 3: Cross multiply
    20,369.79x = 28,109.43 × 11,872.22
  4. Step 4: Simplify right side
    20,369.79x = 333,721,196.49
  5. Step 5: Solve for x
    x = 333,721,196.49/20,369.79
  6. Step 6: Final answer
    x = 16,383.14

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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.