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Finding the Fourth Proportional to 18,659.82, 27,988.77 and 6,972.12

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Solution

The fourth proportional to 18,659.82, 27,988.77 and 6,972.12 is: 10,457.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.82 : 27,988.77 = 6,972.12 : x
  2. Step 2: Convert to fraction form
    18,659.82/27,988.77 = 6,972.12/x
  3. Step 3: Cross multiply
    18,659.82x = 27,988.77 × 6,972.12
  4. Step 4: Simplify right side
    18,659.82x = 195,141,063.09
  5. Step 5: Solve for x
    x = 195,141,063.09/18,659.82
  6. Step 6: Final answer
    x = 10,457.82

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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.