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Finding the Fourth Proportional to 18,705.35, 28,033.79 and 7,599.15

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Solution

The fourth proportional to 18,705.35, 28,033.79 and 7,599.15 is: 11,388.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.35 : 28,033.79 = 7,599.15 : x
  2. Step 2: Convert to fraction form
    18,705.35/28,033.79 = 7,599.15/x
  3. Step 3: Cross multiply
    18,705.35x = 28,033.79 × 7,599.15
  4. Step 4: Simplify right side
    18,705.35x = 213,032,937.28
  5. Step 5: Solve for x
    x = 213,032,937.28/18,705.35
  6. Step 6: Final answer
    x = 11,388.88

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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.