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Finding the Fourth Proportional to 18,616.47, 27,918.36 and 7,520.28

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Solution

The fourth proportional to 18,616.47, 27,918.36 and 7,520.28 is: 11,277.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.47 : 27,918.36 = 7,520.28 : x
  2. Step 2: Convert to fraction form
    18,616.47/27,918.36 = 7,520.28/x
  3. Step 3: Cross multiply
    18,616.47x = 27,918.36 × 7,520.28
  4. Step 4: Simplify right side
    18,616.47x = 209,953,884.34
  5. Step 5: Solve for x
    x = 209,953,884.34/18,616.47
  6. Step 6: Final answer
    x = 11,277.86

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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.