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Finding the Fourth Proportional to 18,586.56, 25,660.68 and 12,223.20

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Solution

The fourth proportional to 18,586.56, 25,660.68 and 12,223.20 is: 16,875.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,586.56 : 25,660.68 = 12,223.20 : x
  2. Step 2: Convert to fraction form
    18,586.56/25,660.68 = 12,223.20/x
  3. Step 3: Cross multiply
    18,586.56x = 25,660.68 × 12,223.20
  4. Step 4: Simplify right side
    18,586.56x = 313,655,623.78
  5. Step 5: Solve for x
    x = 313,655,623.78/18,586.56
  6. Step 6: Final answer
    x = 16,875.40

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Half scale
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Double scale
Find fourth proportional to 18,587.56, 25,662.06 and 12,224.20
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.