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Finding the Fourth Proportional to 12,916, 17,821.84 and 7,610.40

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Solution

The fourth proportional to 12,916, 17,821.84 and 7,610.40 is: 10,501.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,916 : 17,821.84 = 7,610.40 : x
  2. Step 2: Convert to fraction form
    12,916/17,821.84 = 7,610.40/x
  3. Step 3: Cross multiply
    12,916x = 17,821.84 × 7,610.40
  4. Step 4: Simplify right side
    12,916x = 135,631,331.14
  5. Step 5: Solve for x
    x = 135,631,331.14/12,916
  6. Step 6: Final answer
    x = 10,501.03

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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.