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Finding the Fourth Proportional to 13,710.11, 18,920.85 and 7,741.93

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Solution

The fourth proportional to 13,710.11, 18,920.85 and 7,741.93 is: 10,684.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.11 : 18,920.85 = 7,741.93 : x
  2. Step 2: Convert to fraction form
    13,710.11/18,920.85 = 7,741.93/x
  3. Step 3: Cross multiply
    13,710.11x = 18,920.85 × 7,741.93
  4. Step 4: Simplify right side
    13,710.11x = 146,483,896.24
  5. Step 5: Solve for x
    x = 146,483,896.24/13,710.11
  6. Step 6: Final answer
    x = 10,684.37

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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.