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Finding the Fourth Proportional to 12,090.66, 18,139.04 and 5,853.66

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Solution

The fourth proportional to 12,090.66, 18,139.04 and 5,853.66 is: 8,781.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.66 : 18,139.04 = 5,853.66 : x
  2. Step 2: Convert to fraction form
    12,090.66/18,139.04 = 5,853.66/x
  3. Step 3: Cross multiply
    12,090.66x = 18,139.04 × 5,853.66
  4. Step 4: Simplify right side
    12,090.66x = 106,179,772.89
  5. Step 5: Solve for x
    x = 106,179,772.89/12,090.66
  6. Step 6: Final answer
    x = 8,781.97

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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.