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Finding the Fourth Proportional to 31,186, 43,037.59 and 17,039.76

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Solution

The fourth proportional to 31,186, 43,037.59 and 17,039.76 is: 23,515.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,186 : 43,037.59 = 17,039.76 : x
  2. Step 2: Convert to fraction form
    31,186/43,037.59 = 17,039.76/x
  3. Step 3: Cross multiply
    31,186x = 43,037.59 × 17,039.76
  4. Step 4: Simplify right side
    31,186x = 733,349,989.39
  5. Step 5: Solve for x
    x = 733,349,989.39/31,186
  6. Step 6: Final answer
    x = 23,515.36

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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.