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Finding the Fourth Proportional to 13,487.25, 20,234.88 and 6,918.06

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Solution

The fourth proportional to 13,487.25, 20,234.88 and 6,918.06 is: 10,379.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.25 : 20,234.88 = 6,918.06 : x
  2. Step 2: Convert to fraction form
    13,487.25/20,234.88 = 6,918.06/x
  3. Step 3: Cross multiply
    13,487.25x = 20,234.88 × 6,918.06
  4. Step 4: Simplify right side
    13,487.25x = 139,986,113.93
  5. Step 5: Solve for x
    x = 139,986,113.93/13,487.25
  6. Step 6: Final answer
    x = 10,379.14

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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.