Home / 13,427.20-20,121.60-9,318.40

Finding the Fourth Proportional to 13,427.20, 20,121.60 and 9,318.40

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Solution

The fourth proportional to 13,427.20, 20,121.60 and 9,318.40 is: 13,964.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.20 : 20,121.60 = 9,318.40 : x
  2. Step 2: Convert to fraction form
    13,427.20/20,121.60 = 9,318.40/x
  3. Step 3: Cross multiply
    13,427.20x = 20,121.60 × 9,318.40
  4. Step 4: Simplify right side
    13,427.20x = 187,501,117.44
  5. Step 5: Solve for x
    x = 187,501,117.44/13,427.20
  6. Step 6: Final answer
    x = 13,964.28

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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.