Home / 13,119.84-18,105.26-7,151.51

Finding the Fourth Proportional to 13,119.84, 18,105.26 and 7,151.51

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Solution

The fourth proportional to 13,119.84, 18,105.26 and 7,151.51 is: 9,869.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.84 : 18,105.26 = 7,151.51 : x
  2. Step 2: Convert to fraction form
    13,119.84/18,105.26 = 7,151.51/x
  3. Step 3: Cross multiply
    13,119.84x = 18,105.26 × 7,151.51
  4. Step 4: Simplify right side
    13,119.84x = 129,479,947.94
  5. Step 5: Solve for x
    x = 129,479,947.94/13,119.84
  6. Step 6: Final answer
    x = 9,869.02

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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.