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Finding the Fourth Proportional to 18,665.16, 27,971.40 and 10,348.92

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Solution

The fourth proportional to 18,665.16, 27,971.40 and 10,348.92 is: 15,508.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,665.16 : 27,971.40 = 10,348.92 : x
  2. Step 2: Convert to fraction form
    18,665.16/27,971.40 = 10,348.92/x
  3. Step 3: Cross multiply
    18,665.16x = 27,971.40 × 10,348.92
  4. Step 4: Simplify right side
    18,665.16x = 289,473,780.89
  5. Step 5: Solve for x
    x = 289,473,780.89/18,665.16
  6. Step 6: Final answer
    x = 15,508.78

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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.