Home / 13,409.28-20,107.98-7,167.78

Finding the Fourth Proportional to 13,409.28, 20,107.98 and 7,167.78

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Solution

The fourth proportional to 13,409.28, 20,107.98 and 7,167.78 is: 10,748.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.28 : 20,107.98 = 7,167.78 : x
  2. Step 2: Convert to fraction form
    13,409.28/20,107.98 = 7,167.78/x
  3. Step 3: Cross multiply
    13,409.28x = 20,107.98 × 7,167.78
  4. Step 4: Simplify right side
    13,409.28x = 144,129,576.88
  5. Step 5: Solve for x
    x = 144,129,576.88/13,409.28
  6. Step 6: Final answer
    x = 10,748.49

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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.