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Finding the Fourth Proportional to 18,605.64, 27,910.06 and 5,278.68

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Solution

The fourth proportional to 18,605.64, 27,910.06 and 5,278.68 is: 7,918.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.64 : 27,910.06 = 5,278.68 : x
  2. Step 2: Convert to fraction form
    18,605.64/27,910.06 = 5,278.68/x
  3. Step 3: Cross multiply
    18,605.64x = 27,910.06 × 5,278.68
  4. Step 4: Simplify right side
    18,605.64x = 147,328,275.52
  5. Step 5: Solve for x
    x = 147,328,275.52/18,605.64
  6. Step 6: Final answer
    x = 7,918.47

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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.