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Finding the Fourth Proportional to 18,420.69, 27,627.12 and 5,269.53

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Solution

The fourth proportional to 18,420.69, 27,627.12 and 5,269.53 is: 7,903.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.69 : 27,627.12 = 5,269.53 : x
  2. Step 2: Convert to fraction form
    18,420.69/27,627.12 = 5,269.53/x
  3. Step 3: Cross multiply
    18,420.69x = 27,627.12 × 5,269.53
  4. Step 4: Simplify right side
    18,420.69x = 145,581,937.65
  5. Step 5: Solve for x
    x = 145,581,937.65/18,420.69
  6. Step 6: Final answer
    x = 7,903.18

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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.