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Finding the Fourth Proportional to 13,703.69, 18,911.18 and 8,041.79

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Solution

The fourth proportional to 13,703.69, 18,911.18 and 8,041.79 is: 11,097.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,703.69 : 18,911.18 = 8,041.79 : x
  2. Step 2: Convert to fraction form
    13,703.69/18,911.18 = 8,041.79/x
  3. Step 3: Cross multiply
    13,703.69x = 18,911.18 × 8,041.79
  4. Step 4: Simplify right side
    13,703.69x = 152,079,603.45
  5. Step 5: Solve for x
    x = 152,079,603.45/13,703.69
  6. Step 6: Final answer
    x = 11,097.72

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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.