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Finding the Fourth Proportional to 15,811.10, 21,817.32 and 8,737.55

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Solution

The fourth proportional to 15,811.10, 21,817.32 and 8,737.55 is: 12,056.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.10 : 21,817.32 = 8,737.55 : x
  2. Step 2: Convert to fraction form
    15,811.10/21,817.32 = 8,737.55/x
  3. Step 3: Cross multiply
    15,811.10x = 21,817.32 × 8,737.55
  4. Step 4: Simplify right side
    15,811.10x = 190,629,924.37
  5. Step 5: Solve for x
    x = 190,629,924.37/15,811.10
  6. Step 6: Final answer
    x = 12,056.71

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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.