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Finding the Fourth Proportional to 12,239.28, 16,921.08 and 9,047.54

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Solution

The fourth proportional to 12,239.28, 16,921.08 and 9,047.54 is: 12,508.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.28 : 16,921.08 = 9,047.54 : x
  2. Step 2: Convert to fraction form
    12,239.28/16,921.08 = 9,047.54/x
  3. Step 3: Cross multiply
    12,239.28x = 16,921.08 × 9,047.54
  4. Step 4: Simplify right side
    12,239.28x = 153,094,148.14
  5. Step 5: Solve for x
    x = 153,094,148.14/12,239.28
  6. Step 6: Final answer
    x = 12,508.43

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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.