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Finding the Fourth Proportional to 18,806.01, 28,210.80 and 5,297.15

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Solution

The fourth proportional to 18,806.01, 28,210.80 and 5,297.15 is: 7,946.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.01 : 28,210.80 = 5,297.15 : x
  2. Step 2: Convert to fraction form
    18,806.01/28,210.80 = 5,297.15/x
  3. Step 3: Cross multiply
    18,806.01x = 28,210.80 × 5,297.15
  4. Step 4: Simplify right side
    18,806.01x = 149,436,698.17
  5. Step 5: Solve for x
    x = 149,436,698.17/18,806.01
  6. Step 6: Final answer
    x = 7,946.22

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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.