Home / 13,461.28-20,188.78-5,138.24

Finding the Fourth Proportional to 13,461.28, 20,188.78 and 5,138.24

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Solution

The fourth proportional to 13,461.28, 20,188.78 and 5,138.24 is: 7,706.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,461.28 : 20,188.78 = 5,138.24 : x
  2. Step 2: Convert to fraction form
    13,461.28/20,188.78 = 5,138.24/x
  3. Step 3: Cross multiply
    13,461.28x = 20,188.78 × 5,138.24
  4. Step 4: Simplify right side
    13,461.28x = 103,734,796.95
  5. Step 5: Solve for x
    x = 103,734,796.95/13,461.28
  6. Step 6: Final answer
    x = 7,706.16

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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.