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Finding the Fourth Proportional to 36,138.30, 54,216.90 and 13,952.40

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Solution

The fourth proportional to 36,138.30, 54,216.90 and 13,952.40 is: 20,932.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,138.30 : 54,216.90 = 13,952.40 : x
  2. Step 2: Convert to fraction form
    36,138.30/54,216.90 = 13,952.40/x
  3. Step 3: Cross multiply
    36,138.30x = 54,216.90 × 13,952.40
  4. Step 4: Simplify right side
    36,138.30x = 756,455,875.56
  5. Step 5: Solve for x
    x = 756,455,875.56/36,138.30
  6. Step 6: Final answer
    x = 20,932.25

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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.