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Finding the Fourth Proportional to 18,091, 27,120.81 and 7,005.75

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Solution

The fourth proportional to 18,091, 27,120.81 and 7,005.75 is: 10,502.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,091 : 27,120.81 = 7,005.75 : x
  2. Step 2: Convert to fraction form
    18,091/27,120.81 = 7,005.75/x
  3. Step 3: Cross multiply
    18,091x = 27,120.81 × 7,005.75
  4. Step 4: Simplify right side
    18,091x = 190,001,614.66
  5. Step 5: Solve for x
    x = 190,001,614.66/18,091
  6. Step 6: Final answer
    x = 10,502.55

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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.