Home / 13,119.54-18,105.17-7,151.21

Finding the Fourth Proportional to 13,119.54, 18,105.17 and 7,151.21

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Solution

The fourth proportional to 13,119.54, 18,105.17 and 7,151.21 is: 9,868.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.54 : 18,105.17 = 7,151.21 : x
  2. Step 2: Convert to fraction form
    13,119.54/18,105.17 = 7,151.21/x
  3. Step 3: Cross multiply
    13,119.54x = 18,105.17 × 7,151.21
  4. Step 4: Simplify right side
    13,119.54x = 129,473,746.47
  5. Step 5: Solve for x
    x = 129,473,746.47/13,119.54
  6. Step 6: Final answer
    x = 9,868.77

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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.