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Finding the Fourth Proportional to 29,278.51, 40,404.11 and 15,849.49

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Solution

The fourth proportional to 29,278.51, 40,404.11 and 15,849.49 is: 21,872.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,278.51 : 40,404.11 = 15,849.49 : x
  2. Step 2: Convert to fraction form
    29,278.51/40,404.11 = 15,849.49/x
  3. Step 3: Cross multiply
    29,278.51x = 40,404.11 × 15,849.49
  4. Step 4: Simplify right side
    29,278.51x = 640,384,458.16
  5. Step 5: Solve for x
    x = 640,384,458.16/29,278.51
  6. Step 6: Final answer
    x = 21,872.17

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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.