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Finding the Fourth Proportional to 15,134, 20,887.68 and 14,469.80

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Solution

The fourth proportional to 15,134, 20,887.68 and 14,469.80 is: 19,970.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134 : 20,887.68 = 14,469.80 : x
  2. Step 2: Convert to fraction form
    15,134/20,887.68 = 14,469.80/x
  3. Step 3: Cross multiply
    15,134x = 20,887.68 × 14,469.80
  4. Step 4: Simplify right side
    15,134x = 302,240,552.06
  5. Step 5: Solve for x
    x = 302,240,552.06/15,134
  6. Step 6: Final answer
    x = 19,970.96

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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.