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Finding the Fourth Proportional to 11,903.90, 17,864.81 and 8,146.68

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Solution

The fourth proportional to 11,903.90, 17,864.81 and 8,146.68 is: 12,226.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,903.90 : 17,864.81 = 8,146.68 : x
  2. Step 2: Convert to fraction form
    11,903.90/17,864.81 = 8,146.68/x
  3. Step 3: Cross multiply
    11,903.90x = 17,864.81 × 8,146.68
  4. Step 4: Simplify right side
    11,903.90x = 145,538,849.60
  5. Step 5: Solve for x
    x = 145,538,849.60/11,903.90
  6. Step 6: Final answer
    x = 12,226.15

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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.