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Finding the Fourth Proportional to 27,692.39, 38,215.49 and 15,117.14

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Solution

The fourth proportional to 27,692.39, 38,215.49 and 15,117.14 is: 20,861.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,692.39 : 38,215.49 = 15,117.14 : x
  2. Step 2: Convert to fraction form
    27,692.39/38,215.49 = 15,117.14/x
  3. Step 3: Cross multiply
    27,692.39x = 38,215.49 × 15,117.14
  4. Step 4: Simplify right side
    27,692.39x = 577,708,912.50
  5. Step 5: Solve for x
    x = 577,708,912.50/27,692.39
  6. Step 6: Final answer
    x = 20,861.65

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Half scale
Find fourth proportional to 55,384.78, 76,430.98 and 30,234.28
Double scale
Find fourth proportional to 27,693.39, 38,216.87 and 15,118.14
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.