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Finding the Fourth Proportional to 16,366.60, 22,588.05 and 9,991.87

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Solution

The fourth proportional to 16,366.60, 22,588.05 and 9,991.87 is: 13,790.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,366.60 : 22,588.05 = 9,991.87 : x
  2. Step 2: Convert to fraction form
    16,366.60/22,588.05 = 9,991.87/x
  3. Step 3: Cross multiply
    16,366.60x = 22,588.05 × 9,991.87
  4. Step 4: Simplify right side
    16,366.60x = 225,696,859.15
  5. Step 5: Solve for x
    x = 225,696,859.15/16,366.60
  6. Step 6: Final answer
    x = 13,790.09

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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.