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Finding the Fourth Proportional to 15,759.52, 21,748.06 and 8,685.92

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Solution

The fourth proportional to 15,759.52, 21,748.06 and 8,685.92 is: 11,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,759.52 : 21,748.06 = 8,685.92 : x
  2. Step 2: Convert to fraction form
    15,759.52/21,748.06 = 8,685.92/x
  3. Step 3: Cross multiply
    15,759.52x = 21,748.06 × 8,685.92
  4. Step 4: Simplify right side
    15,759.52x = 188,901,909.32
  5. Step 5: Solve for x
    x = 188,901,909.32/15,759.52
  6. Step 6: Final answer
    x = 11,986.53

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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.