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Finding the Fourth Proportional to 18,345.69, 27,518.54 and 7,257.60

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Solution

The fourth proportional to 18,345.69, 27,518.54 and 7,257.60 is: 10,886.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,345.69 : 27,518.54 = 7,257.60 : x
  2. Step 2: Convert to fraction form
    18,345.69/27,518.54 = 7,257.60/x
  3. Step 3: Cross multiply
    18,345.69x = 27,518.54 × 7,257.60
  4. Step 4: Simplify right side
    18,345.69x = 199,718,519.62
  5. Step 5: Solve for x
    x = 199,718,519.62/18,345.69
  6. Step 6: Final answer
    x = 10,886.40

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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.