Home / 13,121.46-19,678.68-8,960.76

Finding the Fourth Proportional to 13,121.46, 19,678.68 and 8,960.76

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Solution

The fourth proportional to 13,121.46, 19,678.68 and 8,960.76 is: 13,438.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.46 : 19,678.68 = 8,960.76 : x
  2. Step 2: Convert to fraction form
    13,121.46/19,678.68 = 8,960.76/x
  3. Step 3: Cross multiply
    13,121.46x = 19,678.68 × 8,960.76
  4. Step 4: Simplify right side
    13,121.46x = 176,335,928.60
  5. Step 5: Solve for x
    x = 176,335,928.60/13,121.46
  6. Step 6: Final answer
    x = 13,438.74

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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.