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Finding the Fourth Proportional to 15,793.47, 21,794.13 and 8,719.38

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Solution

The fourth proportional to 15,793.47, 21,794.13 and 8,719.38 is: 12,032.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,793.47 : 21,794.13 = 8,719.38 : x
  2. Step 2: Convert to fraction form
    15,793.47/21,794.13 = 8,719.38/x
  3. Step 3: Cross multiply
    15,793.47x = 21,794.13 × 8,719.38
  4. Step 4: Simplify right side
    15,793.47x = 190,031,301.24
  5. Step 5: Solve for x
    x = 190,031,301.24/15,793.47
  6. Step 6: Final answer
    x = 12,032.27

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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.