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Finding the Fourth Proportional to 12,000.40, 17,911.70 and 11,261.68

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Solution

The fourth proportional to 12,000.40, 17,911.70 and 11,261.68 is: 16,809.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,000.40 : 17,911.70 = 11,261.68 : x
  2. Step 2: Convert to fraction form
    12,000.40/17,911.70 = 11,261.68/x
  3. Step 3: Cross multiply
    12,000.40x = 17,911.70 × 11,261.68
  4. Step 4: Simplify right side
    12,000.40x = 201,715,833.66
  5. Step 5: Solve for x
    x = 201,715,833.66/12,000.40
  6. Step 6: Final answer
    x = 16,809.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.