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Finding the Fourth Proportional to 15,664.60, 21,617.94 and 8,591.68

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Solution

The fourth proportional to 15,664.60, 21,617.94 and 8,591.68 is: 11,856.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,664.60 : 21,617.94 = 8,591.68 : x
  2. Step 2: Convert to fraction form
    15,664.60/21,617.94 = 8,591.68/x
  3. Step 3: Cross multiply
    15,664.60x = 21,617.94 × 8,591.68
  4. Step 4: Simplify right side
    15,664.60x = 185,734,422.74
  5. Step 5: Solve for x
    x = 185,734,422.74/15,664.60
  6. Step 6: Final answer
    x = 11,856.95

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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.