Home / 13,638.18-20,447.73-5,311.20

Finding the Fourth Proportional to 13,638.18, 20,447.73 and 5,311.20

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Solution

The fourth proportional to 13,638.18, 20,447.73 and 5,311.20 is: 7,963.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.18 : 20,447.73 = 5,311.20 : x
  2. Step 2: Convert to fraction form
    13,638.18/20,447.73 = 5,311.20/x
  3. Step 3: Cross multiply
    13,638.18x = 20,447.73 × 5,311.20
  4. Step 4: Simplify right side
    13,638.18x = 108,601,983.58
  5. Step 5: Solve for x
    x = 108,601,983.58/13,638.18
  6. Step 6: Final answer
    x = 7,963.08

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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.