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Finding the Fourth Proportional to 18,302.62, 25,257.55 and 9,919.14

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Solution

The fourth proportional to 18,302.62, 25,257.55 and 9,919.14 is: 13,688.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,302.62 : 25,257.55 = 9,919.14 : x
  2. Step 2: Convert to fraction form
    18,302.62/25,257.55 = 9,919.14/x
  3. Step 3: Cross multiply
    18,302.62x = 25,257.55 × 9,919.14
  4. Step 4: Simplify right side
    18,302.62x = 250,533,174.51
  5. Step 5: Solve for x
    x = 250,533,174.51/18,302.62
  6. Step 6: Final answer
    x = 13,688.38

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Half scale
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Double scale
Find fourth proportional to 18,303.62, 25,258.93 and 9,920.14
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.