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Finding the Fourth Proportional to 11,722.55, 17,621.93 and 9,407.92

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Solution

The fourth proportional to 11,722.55, 17,621.93 and 9,407.92 is: 14,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,722.55 : 17,621.93 = 9,407.92 : x
  2. Step 2: Convert to fraction form
    11,722.55/17,621.93 = 9,407.92/x
  3. Step 3: Cross multiply
    11,722.55x = 17,621.93 × 9,407.92
  4. Step 4: Simplify right side
    11,722.55x = 165,785,572.54
  5. Step 5: Solve for x
    x = 165,785,572.54/11,722.55
  6. Step 6: Final answer
    x = 14,142.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.