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Finding the Fourth Proportional to 13,347, 18,418.32 and 7,378.38

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Solution

The fourth proportional to 13,347, 18,418.32 and 7,378.38 is: 10,181.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347 : 18,418.32 = 7,378.38 : x
  2. Step 2: Convert to fraction form
    13,347/18,418.32 = 7,378.38/x
  3. Step 3: Cross multiply
    13,347x = 18,418.32 × 7,378.38
  4. Step 4: Simplify right side
    13,347x = 135,897,363.92
  5. Step 5: Solve for x
    x = 135,897,363.92/13,347
  6. Step 6: Final answer
    x = 10,181.87

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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.