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Finding the Fourth Proportional to 12,960.92, 17,886.48 and 7,372.28

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Solution

The fourth proportional to 12,960.92, 17,886.48 and 7,372.28 is: 10,173.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,960.92 : 17,886.48 = 7,372.28 : x
  2. Step 2: Convert to fraction form
    12,960.92/17,886.48 = 7,372.28/x
  3. Step 3: Cross multiply
    12,960.92x = 17,886.48 × 7,372.28
  4. Step 4: Simplify right side
    12,960.92x = 131,864,155.84
  5. Step 5: Solve for x
    x = 131,864,155.84/12,960.92
  6. Step 6: Final answer
    x = 10,173.98

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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.