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Finding the Fourth Proportional to 11,510.72, 15,910.08 and 8,388.80

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Solution

The fourth proportional to 11,510.72, 15,910.08 and 8,388.80 is: 11,594.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,510.72 : 15,910.08 = 8,388.80 : x
  2. Step 2: Convert to fraction form
    11,510.72/15,910.08 = 8,388.80/x
  3. Step 3: Cross multiply
    11,510.72x = 15,910.08 × 8,388.80
  4. Step 4: Simplify right side
    11,510.72x = 133,466,479.10
  5. Step 5: Solve for x
    x = 133,466,479.10/11,510.72
  6. Step 6: Final answer
    x = 11,594.97

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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.