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Finding the Fourth Proportional to 18,364.71, 25,343.30 and 9,981.21

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Solution

The fourth proportional to 18,364.71, 25,343.30 and 9,981.21 is: 13,774.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,364.71 : 25,343.30 = 9,981.21 : x
  2. Step 2: Convert to fraction form
    18,364.71/25,343.30 = 9,981.21/x
  3. Step 3: Cross multiply
    18,364.71x = 25,343.30 × 9,981.21
  4. Step 4: Simplify right side
    18,364.71x = 252,956,919.38
  5. Step 5: Solve for x
    x = 252,956,919.38/18,364.71
  6. Step 6: Final answer
    x = 13,774.07

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Half scale
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Double scale
Find fourth proportional to 18,365.71, 25,344.68 and 9,982.21
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.