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Finding the Fourth Proportional to 13,691.37, 18,894.11 and 7,403.74

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Solution

The fourth proportional to 13,691.37, 18,894.11 and 7,403.74 is: 10,217.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.37 : 18,894.11 = 7,403.74 : x
  2. Step 2: Convert to fraction form
    13,691.37/18,894.11 = 7,403.74/x
  3. Step 3: Cross multiply
    13,691.37x = 18,894.11 × 7,403.74
  4. Step 4: Simplify right side
    13,691.37x = 139,887,077.97
  5. Step 5: Solve for x
    x = 139,887,077.97/13,691.37
  6. Step 6: Final answer
    x = 10,217.17

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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.