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Finding the Fourth Proportional to 12,391.97, 18,588.80 and 4,996.49

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Solution

The fourth proportional to 12,391.97, 18,588.80 and 4,996.49 is: 7,495.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.97 : 18,588.80 = 4,996.49 : x
  2. Step 2: Convert to fraction form
    12,391.97/18,588.80 = 4,996.49/x
  3. Step 3: Cross multiply
    12,391.97x = 18,588.80 × 4,996.49
  4. Step 4: Simplify right side
    12,391.97x = 92,878,672.86
  5. Step 5: Solve for x
    x = 92,878,672.86/12,391.97
  6. Step 6: Final answer
    x = 7,495.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.