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Finding the Fourth Proportional to 13,228.20, 18,545.40 and 13,228.20

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Solution

The fourth proportional to 13,228.20, 18,545.40 and 13,228.20 is: 18,545.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.20 : 18,545.40 = 13,228.20 : x
  2. Step 2: Convert to fraction form
    13,228.20/18,545.40 = 13,228.20/x
  3. Step 3: Cross multiply
    13,228.20x = 18,545.40 × 13,228.20
  4. Step 4: Simplify right side
    13,228.20x = 245,322,260.28
  5. Step 5: Solve for x
    x = 245,322,260.28/13,228.20
  6. Step 6: Final answer
    x = 18,545.40

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.