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Finding the Fourth Proportional to 8,905.12, 13,358.02 and 2,665.22

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Solution

The fourth proportional to 8,905.12, 13,358.02 and 2,665.22 is: 3,997.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.12 : 13,358.02 = 2,665.22 : x
  2. Step 2: Convert to fraction form
    8,905.12/13,358.02 = 2,665.22/x
  3. Step 3: Cross multiply
    8,905.12x = 13,358.02 × 2,665.22
  4. Step 4: Simplify right side
    8,905.12x = 35,602,062.06
  5. Step 5: Solve for x
    x = 35,602,062.06/8,905.12
  6. Step 6: Final answer
    x = 3,997.93

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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.