Home / 13,121.46-18,103.10-9,141.12

Finding the Fourth Proportional to 13,121.46, 18,103.10 and 9,141.12

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Solution

The fourth proportional to 13,121.46, 18,103.10 and 9,141.12 is: 12,611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.46 : 18,103.10 = 9,141.12 : x
  2. Step 2: Convert to fraction form
    13,121.46/18,103.10 = 9,141.12/x
  3. Step 3: Cross multiply
    13,121.46x = 18,103.10 × 9,141.12
  4. Step 4: Simplify right side
    13,121.46x = 165,482,563.77
  5. Step 5: Solve for x
    x = 165,482,563.77/13,121.46
  6. Step 6: Final answer
    x = 12,611.60

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Double scale
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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.