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Finding the Fourth Proportional to 15,759.63, 21,747.42 and 8,684.82

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Solution

The fourth proportional to 15,759.63, 21,747.42 and 8,684.82 is: 11,984.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,759.63 : 21,747.42 = 8,684.82 : x
  2. Step 2: Convert to fraction form
    15,759.63/21,747.42 = 8,684.82/x
  3. Step 3: Cross multiply
    15,759.63x = 21,747.42 × 8,684.82
  4. Step 4: Simplify right side
    15,759.63x = 188,872,428.16
  5. Step 5: Solve for x
    x = 188,872,428.16/15,759.63
  6. Step 6: Final answer
    x = 11,984.57

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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.