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Finding the Fourth Proportional to 13,412.52, 18,515.94 and 8,379.53

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Solution

The fourth proportional to 13,412.52, 18,515.94 and 8,379.53 is: 11,567.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.52 : 18,515.94 = 8,379.53 : x
  2. Step 2: Convert to fraction form
    13,412.52/18,515.94 = 8,379.53/x
  3. Step 3: Cross multiply
    13,412.52x = 18,515.94 × 8,379.53
  4. Step 4: Simplify right side
    13,412.52x = 155,154,921.00
  5. Step 5: Solve for x
    x = 155,154,921.00/13,412.52
  6. Step 6: Final answer
    x = 11,567.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.