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Finding the Fourth Proportional to 18,590.68, 27,886.38 and 7,345.72

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Solution

The fourth proportional to 18,590.68, 27,886.38 and 7,345.72 is: 11,018.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,590.68 : 27,886.38 = 7,345.72 : x
  2. Step 2: Convert to fraction form
    18,590.68/27,886.38 = 7,345.72/x
  3. Step 3: Cross multiply
    18,590.68x = 27,886.38 × 7,345.72
  4. Step 4: Simplify right side
    18,590.68x = 204,845,539.29
  5. Step 5: Solve for x
    x = 204,845,539.29/18,590.68
  6. Step 6: Final answer
    x = 11,018.72

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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.