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Finding the Fourth Proportional to 11,556.72, 15,949.08 and 8,719.11

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Solution

The fourth proportional to 11,556.72, 15,949.08 and 8,719.11 is: 12,032.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,556.72 : 15,949.08 = 8,719.11 : x
  2. Step 2: Convert to fraction form
    11,556.72/15,949.08 = 8,719.11/x
  3. Step 3: Cross multiply
    11,556.72x = 15,949.08 × 8,719.11
  4. Step 4: Simplify right side
    11,556.72x = 139,061,782.92
  5. Step 5: Solve for x
    x = 139,061,782.92/11,556.72
  6. Step 6: Final answer
    x = 12,032.98

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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.