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Finding the Fourth Proportional to 18,920.77, 26,109.51 and 10,961.62

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Solution

The fourth proportional to 18,920.77, 26,109.51 and 10,961.62 is: 15,126.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.77 : 26,109.51 = 10,961.62 : x
  2. Step 2: Convert to fraction form
    18,920.77/26,109.51 = 10,961.62/x
  3. Step 3: Cross multiply
    18,920.77x = 26,109.51 × 10,961.62
  4. Step 4: Simplify right side
    18,920.77x = 286,202,396.46
  5. Step 5: Solve for x
    x = 286,202,396.46/18,920.77
  6. Step 6: Final answer
    x = 15,126.36

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Double scale
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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.