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Finding the Fourth Proportional to 18,724.84, 28,080.37 and 7,625.50

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Solution

The fourth proportional to 18,724.84, 28,080.37 and 7,625.50 is: 11,435.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.84 : 28,080.37 = 7,625.50 : x
  2. Step 2: Convert to fraction form
    18,724.84/28,080.37 = 7,625.50/x
  3. Step 3: Cross multiply
    18,724.84x = 28,080.37 × 7,625.50
  4. Step 4: Simplify right side
    18,724.84x = 214,126,682.91
  5. Step 5: Solve for x
    x = 214,126,682.91/18,724.84
  6. Step 6: Final answer
    x = 11,435.44

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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.