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Finding the Fourth Proportional to 21,796.55, 30,078.33 and 12,366.89

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Solution

The fourth proportional to 21,796.55, 30,078.33 and 12,366.89 is: 17,065.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,796.55 : 30,078.33 = 12,366.89 : x
  2. Step 2: Convert to fraction form
    21,796.55/30,078.33 = 12,366.89/x
  3. Step 3: Cross multiply
    21,796.55x = 30,078.33 × 12,366.89
  4. Step 4: Simplify right side
    21,796.55x = 371,975,398.49
  5. Step 5: Solve for x
    x = 371,975,398.49/21,796.55
  6. Step 6: Final answer
    x = 17,065.79

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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.