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Finding the Fourth Proportional to 18,724.34, 28,079.62 and 7,625.00

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Solution

The fourth proportional to 18,724.34, 28,079.62 and 7,625.00 is: 11,434.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.34 : 28,079.62 = 7,625.00 : x
  2. Step 2: Convert to fraction form
    18,724.34/28,079.62 = 7,625.00/x
  3. Step 3: Cross multiply
    18,724.34x = 28,079.62 × 7,625.00
  4. Step 4: Simplify right side
    18,724.34x = 214,106,943.04
  5. Step 5: Solve for x
    x = 214,106,943.04/18,724.34
  6. Step 6: Final answer
    x = 11,434.69

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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.