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Finding the Fourth Proportional to 11,166.68, 15,420.39 and 7,194.68

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Solution

The fourth proportional to 11,166.68, 15,420.39 and 7,194.68 is: 9,935.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,166.68 : 15,420.39 = 7,194.68 : x
  2. Step 2: Convert to fraction form
    11,166.68/15,420.39 = 7,194.68/x
  3. Step 3: Cross multiply
    11,166.68x = 15,420.39 × 7,194.68
  4. Step 4: Simplify right side
    11,166.68x = 110,944,771.53
  5. Step 5: Solve for x
    x = 110,944,771.53/11,166.68
  6. Step 6: Final answer
    x = 9,935.34

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Double scale
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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.