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Finding the Fourth Proportional to 12,908.28, 19,362.42 and 9,020.28

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Solution

The fourth proportional to 12,908.28, 19,362.42 and 9,020.28 is: 13,530.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.28 : 19,362.42 = 9,020.28 : x
  2. Step 2: Convert to fraction form
    12,908.28/19,362.42 = 9,020.28/x
  3. Step 3: Cross multiply
    12,908.28x = 19,362.42 × 9,020.28
  4. Step 4: Simplify right side
    12,908.28x = 174,654,449.88
  5. Step 5: Solve for x
    x = 174,654,449.88/12,908.28
  6. Step 6: Final answer
    x = 13,530.42

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.