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Finding the Fourth Proportional to 13,542.50, 18,690.81 and 7,952.42

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Solution

The fourth proportional to 13,542.50, 18,690.81 and 7,952.42 is: 10,975.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,542.50 : 18,690.81 = 7,952.42 : x
  2. Step 2: Convert to fraction form
    13,542.50/18,690.81 = 7,952.42/x
  3. Step 3: Cross multiply
    13,542.50x = 18,690.81 × 7,952.42
  4. Step 4: Simplify right side
    13,542.50x = 148,637,171.26
  5. Step 5: Solve for x
    x = 148,637,171.26/13,542.50
  6. Step 6: Final answer
    x = 10,975.61

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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.