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Finding the Fourth Proportional to 18,920.81, 26,110.17 and 10,855.82

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Solution

The fourth proportional to 18,920.81, 26,110.17 and 10,855.82 is: 14,980.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.81 : 26,110.17 = 10,855.82 : x
  2. Step 2: Convert to fraction form
    18,920.81/26,110.17 = 10,855.82/x
  3. Step 3: Cross multiply
    18,920.81x = 26,110.17 × 10,855.82
  4. Step 4: Simplify right side
    18,920.81x = 283,447,175.14
  5. Step 5: Solve for x
    x = 283,447,175.14/18,920.81
  6. Step 6: Final answer
    x = 14,980.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.