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Finding the Fourth Proportional to 15,806.72, 21,813.60 and 8,733.60

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Solution

The fourth proportional to 15,806.72, 21,813.60 and 8,733.60 is: 12,052.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,806.72 : 21,813.60 = 8,733.60 : x
  2. Step 2: Convert to fraction form
    15,806.72/21,813.60 = 8,733.60/x
  3. Step 3: Cross multiply
    15,806.72x = 21,813.60 × 8,733.60
  4. Step 4: Simplify right side
    15,806.72x = 190,511,256.96
  5. Step 5: Solve for x
    x = 190,511,256.96/15,806.72
  6. Step 6: Final answer
    x = 12,052.55

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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.