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Finding the Fourth Proportional to 15,930.57, 21,984.44 and 8,760.79

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Solution

The fourth proportional to 15,930.57, 21,984.44 and 8,760.79 is: 12,090.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.57 : 21,984.44 = 8,760.79 : x
  2. Step 2: Convert to fraction form
    15,930.57/21,984.44 = 8,760.79/x
  3. Step 3: Cross multiply
    15,930.57x = 21,984.44 × 8,760.79
  4. Step 4: Simplify right side
    15,930.57x = 192,601,062.11
  5. Step 5: Solve for x
    x = 192,601,062.11/15,930.57
  6. Step 6: Final answer
    x = 12,090.03

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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.