Home / 13,121.28-18,107.26-7,152.96

Finding the Fourth Proportional to 13,121.28, 18,107.26 and 7,152.96

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Solution

The fourth proportional to 13,121.28, 18,107.26 and 7,152.96 is: 9,871.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.28 : 18,107.26 = 7,152.96 : x
  2. Step 2: Convert to fraction form
    13,121.28/18,107.26 = 7,152.96/x
  3. Step 3: Cross multiply
    13,121.28x = 18,107.26 × 7,152.96
  4. Step 4: Simplify right side
    13,121.28x = 129,520,506.49
  5. Step 5: Solve for x
    x = 129,520,506.49/13,121.28
  6. Step 6: Final answer
    x = 9,871.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.