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Finding the Fourth Proportional to 18,870, 28,305.04 and 6,558

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Solution

The fourth proportional to 18,870, 28,305.04 and 6,558 is: 9,837.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870 : 28,305.04 = 6,558 : x
  2. Step 2: Convert to fraction form
    18,870/28,305.04 = 6,558/x
  3. Step 3: Cross multiply
    18,870x = 28,305.04 × 6,558
  4. Step 4: Simplify right side
    18,870x = 185,624,452.32
  5. Step 5: Solve for x
    x = 185,624,452.32/18,870
  6. Step 6: Final answer
    x = 9,837.01

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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.