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Finding the Fourth Proportional to 11,261.40, 16,859.70 and 9,965.40

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Solution

The fourth proportional to 11,261.40, 16,859.70 and 9,965.40 is: 14,919.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,261.40 : 16,859.70 = 9,965.40 : x
  2. Step 2: Convert to fraction form
    11,261.40/16,859.70 = 9,965.40/x
  3. Step 3: Cross multiply
    11,261.40x = 16,859.70 × 9,965.40
  4. Step 4: Simplify right side
    11,261.40x = 168,013,654.38
  5. Step 5: Solve for x
    x = 168,013,654.38/11,261.40
  6. Step 6: Final answer
    x = 14,919.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.