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Finding the Fourth Proportional to 13,726.66, 18,944.47 and 8,951.71

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Solution

The fourth proportional to 13,726.66, 18,944.47 and 8,951.71 is: 12,354.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.66 : 18,944.47 = 8,951.71 : x
  2. Step 2: Convert to fraction form
    13,726.66/18,944.47 = 8,951.71/x
  3. Step 3: Cross multiply
    13,726.66x = 18,944.47 × 8,951.71
  4. Step 4: Simplify right side
    13,726.66x = 169,585,401.54
  5. Step 5: Solve for x
    x = 169,585,401.54/13,726.66
  6. Step 6: Final answer
    x = 12,354.45

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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.