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Finding the Fourth Proportional to 15,794.32, 21,795.60 and 8,720.73

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Solution

The fourth proportional to 15,794.32, 21,795.60 and 8,720.73 is: 12,034.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,794.32 : 21,795.60 = 8,720.73 : x
  2. Step 2: Convert to fraction form
    15,794.32/21,795.60 = 8,720.73/x
  3. Step 3: Cross multiply
    15,794.32x = 21,795.60 × 8,720.73
  4. Step 4: Simplify right side
    15,794.32x = 190,073,542.79
  5. Step 5: Solve for x
    x = 190,073,542.79/15,794.32
  6. Step 6: Final answer
    x = 12,034.30

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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.