Home / 13,120.28-18,105.88-7,151.96

Finding the Fourth Proportional to 13,120.28, 18,105.88 and 7,151.96

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Solution

The fourth proportional to 13,120.28, 18,105.88 and 7,151.96 is: 9,869.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.28 : 18,105.88 = 7,151.96 : x
  2. Step 2: Convert to fraction form
    13,120.28/18,105.88 = 7,151.96/x
  3. Step 3: Cross multiply
    13,120.28x = 18,105.88 × 7,151.96
  4. Step 4: Simplify right side
    13,120.28x = 129,492,529.52
  5. Step 5: Solve for x
    x = 129,492,529.52/13,120.28
  6. Step 6: Final answer
    x = 9,869.65

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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.