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Finding the Fourth Proportional to 18,625.98, 25,704 and 10,128.14

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Solution

The fourth proportional to 18,625.98, 25,704 and 10,128.14 is: 13,976.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,625.98 : 25,704 = 10,128.14 : x
  2. Step 2: Convert to fraction form
    18,625.98/25,704 = 10,128.14/x
  3. Step 3: Cross multiply
    18,625.98x = 25,704 × 10,128.14
  4. Step 4: Simplify right side
    18,625.98x = 260,333,678.43
  5. Step 5: Solve for x
    x = 260,333,678.43/18,625.98
  6. Step 6: Final answer
    x = 13,976.91

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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.