Home / 13,119.21-18,104.91-7,151.27

Finding the Fourth Proportional to 13,119.21, 18,104.91 and 7,151.27

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Solution

The fourth proportional to 13,119.21, 18,104.91 and 7,151.27 is: 9,868.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.21 : 18,104.91 = 7,151.27 : x
  2. Step 2: Convert to fraction form
    13,119.21/18,104.91 = 7,151.27/x
  3. Step 3: Cross multiply
    13,119.21x = 18,104.91 × 7,151.27
  4. Step 4: Simplify right side
    13,119.21x = 129,473,099.74
  5. Step 5: Solve for x
    x = 129,473,099.74/13,119.21
  6. Step 6: Final answer
    x = 9,868.97

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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.