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Finding the Fourth Proportional to 15,794.02, 21,795.36 and 8,720.29

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Solution

The fourth proportional to 15,794.02, 21,795.36 and 8,720.29 is: 12,033.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,794.02 : 21,795.36 = 8,720.29 : x
  2. Step 2: Convert to fraction form
    15,794.02/21,795.36 = 8,720.29/x
  3. Step 3: Cross multiply
    15,794.02x = 21,795.36 × 8,720.29
  4. Step 4: Simplify right side
    15,794.02x = 190,061,750.88
  5. Step 5: Solve for x
    x = 190,061,750.88/15,794.02
  6. Step 6: Final answer
    x = 12,033.78

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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.