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Finding the Fourth Proportional to 22,105.70, 30,508.48 and 12,416.76

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Solution

The fourth proportional to 22,105.70, 30,508.48 and 12,416.76 is: 17,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,105.70 : 30,508.48 = 12,416.76 : x
  2. Step 2: Convert to fraction form
    22,105.70/30,508.48 = 12,416.76/x
  3. Step 3: Cross multiply
    22,105.70x = 30,508.48 × 12,416.76
  4. Step 4: Simplify right side
    22,105.70x = 378,816,474.12
  5. Step 5: Solve for x
    x = 378,816,474.12/22,105.70
  6. Step 6: Final answer
    x = 17,136.60

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Half scale
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Double scale
Find fourth proportional to 22,106.70, 30,509.86 and 12,417.76
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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.