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Finding the Fourth Proportional to 13,105.67, 18,077.67 and 7,998.86

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Solution

The fourth proportional to 13,105.67, 18,077.67 and 7,998.86 is: 11,033.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.67 : 18,077.67 = 7,998.86 : x
  2. Step 2: Convert to fraction form
    13,105.67/18,077.67 = 7,998.86/x
  3. Step 3: Cross multiply
    13,105.67x = 18,077.67 × 7,998.86
  4. Step 4: Simplify right side
    13,105.67x = 144,600,751.46
  5. Step 5: Solve for x
    x = 144,600,751.46/13,105.67
  6. Step 6: Final answer
    x = 11,033.45

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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.