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Finding the Fourth Proportional to 13,288, 18,341.76 and 7,697.92

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Solution

The fourth proportional to 13,288, 18,341.76 and 7,697.92 is: 10,625.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288 : 18,341.76 = 7,697.92 : x
  2. Step 2: Convert to fraction form
    13,288/18,341.76 = 7,697.92/x
  3. Step 3: Cross multiply
    13,288x = 18,341.76 × 7,697.92
  4. Step 4: Simplify right side
    13,288x = 141,193,401.14
  5. Step 5: Solve for x
    x = 141,193,401.14/13,288
  6. Step 6: Final answer
    x = 10,625.63

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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.