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Finding the Fourth Proportional to 12,420.87, 17,141.12 and 6,755.94

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Solution

The fourth proportional to 12,420.87, 17,141.12 and 6,755.94 is: 9,323.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.87 : 17,141.12 = 6,755.94 : x
  2. Step 2: Convert to fraction form
    12,420.87/17,141.12 = 6,755.94/x
  3. Step 3: Cross multiply
    12,420.87x = 17,141.12 × 6,755.94
  4. Step 4: Simplify right side
    12,420.87x = 115,804,369.81
  5. Step 5: Solve for x
    x = 115,804,369.81/12,420.87
  6. Step 6: Final answer
    x = 9,323.37

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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.