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Finding the Fourth Proportional to 13,178.58, 18,188.11 and 8,645.07

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Solution

The fourth proportional to 13,178.58, 18,188.11 and 8,645.07 is: 11,931.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.58 : 18,188.11 = 8,645.07 : x
  2. Step 2: Convert to fraction form
    13,178.58/18,188.11 = 8,645.07/x
  3. Step 3: Cross multiply
    13,178.58x = 18,188.11 × 8,645.07
  4. Step 4: Simplify right side
    13,178.58x = 157,237,484.12
  5. Step 5: Solve for x
    x = 157,237,484.12/13,178.58
  6. Step 6: Final answer
    x = 11,931.29

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Half scale
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Double scale
Find fourth proportional to 13,179.58, 18,189.49 and 8,646.07
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.