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Finding the Fourth Proportional to 12,086.76, 18,130.14 and 7,699.80

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Solution

The fourth proportional to 12,086.76, 18,130.14 and 7,699.80 is: 11,549.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,086.76 : 18,130.14 = 7,699.80 : x
  2. Step 2: Convert to fraction form
    12,086.76/18,130.14 = 7,699.80/x
  3. Step 3: Cross multiply
    12,086.76x = 18,130.14 × 7,699.80
  4. Step 4: Simplify right side
    12,086.76x = 139,598,451.97
  5. Step 5: Solve for x
    x = 139,598,451.97/12,086.76
  6. Step 6: Final answer
    x = 11,549.70

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Half scale
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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.