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Finding the Fourth Proportional to 18,457.61, 27,687.62 and 5,310.09

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Solution

The fourth proportional to 18,457.61, 27,687.62 and 5,310.09 is: 7,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,457.61 : 27,687.62 = 5,310.09 : x
  2. Step 2: Convert to fraction form
    18,457.61/27,687.62 = 5,310.09/x
  3. Step 3: Cross multiply
    18,457.61x = 27,687.62 × 5,310.09
  4. Step 4: Simplify right side
    18,457.61x = 147,023,767.36
  5. Step 5: Solve for x
    x = 147,023,767.36/18,457.61
  6. Step 6: Final answer
    x = 7,965.48

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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.