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Finding the Fourth Proportional to 21,245.76, 29,318.76 and 11,814.24

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Solution

The fourth proportional to 21,245.76, 29,318.76 and 11,814.24 is: 16,303.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.76 : 29,318.76 = 11,814.24 : x
  2. Step 2: Convert to fraction form
    21,245.76/29,318.76 = 11,814.24/x
  3. Step 3: Cross multiply
    21,245.76x = 29,318.76 × 11,814.24
  4. Step 4: Simplify right side
    21,245.76x = 346,378,867.14
  5. Step 5: Solve for x
    x = 346,378,867.14/21,245.76
  6. Step 6: Final answer
    x = 16,303.43

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.