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Finding the Fourth Proportional to 18,794.79, 28,192.17 and 7,699.47

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Solution

The fourth proportional to 18,794.79, 28,192.17 and 7,699.47 is: 11,549.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794.79 : 28,192.17 = 7,699.47 : x
  2. Step 2: Convert to fraction form
    18,794.79/28,192.17 = 7,699.47/x
  3. Step 3: Cross multiply
    18,794.79x = 28,192.17 × 7,699.47
  4. Step 4: Simplify right side
    18,794.79x = 217,064,767.15
  5. Step 5: Solve for x
    x = 217,064,767.15/18,794.79
  6. Step 6: Final answer
    x = 11,549.20

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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.