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Finding the Fourth Proportional to 18,305.19, 27,457.79 and 7,217.10

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Solution

The fourth proportional to 18,305.19, 27,457.79 and 7,217.10 is: 10,825.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.19 : 27,457.79 = 7,217.10 : x
  2. Step 2: Convert to fraction form
    18,305.19/27,457.79 = 7,217.10/x
  3. Step 3: Cross multiply
    18,305.19x = 27,457.79 × 7,217.10
  4. Step 4: Simplify right side
    18,305.19x = 198,165,580.12
  5. Step 5: Solve for x
    x = 198,165,580.12/18,305.19
  6. Step 6: Final answer
    x = 10,825.65

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Double scale
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Similar ratio
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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.