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Finding the Fourth Proportional to 26,689.49, 36,831.89 and 15,511.49

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Solution

The fourth proportional to 26,689.49, 36,831.89 and 15,511.49 is: 21,406.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,689.49 : 36,831.89 = 15,511.49 : x
  2. Step 2: Convert to fraction form
    26,689.49/36,831.89 = 15,511.49/x
  3. Step 3: Cross multiply
    26,689.49x = 36,831.89 × 15,511.49
  4. Step 4: Simplify right side
    26,689.49x = 571,317,493.42
  5. Step 5: Solve for x
    x = 571,317,493.42/26,689.49
  6. Step 6: Final answer
    x = 21,406.09

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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.