Home / 13,679.20-18,877.30-7,391.57

Finding the Fourth Proportional to 13,679.20, 18,877.30 and 7,391.57

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Solution

The fourth proportional to 13,679.20, 18,877.30 and 7,391.57 is: 10,200.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.20 : 18,877.30 = 7,391.57 : x
  2. Step 2: Convert to fraction form
    13,679.20/18,877.30 = 7,391.57/x
  3. Step 3: Cross multiply
    13,679.20x = 18,877.30 × 7,391.57
  4. Step 4: Simplify right side
    13,679.20x = 139,532,884.36
  5. Step 5: Solve for x
    x = 139,532,884.36/13,679.20
  6. Step 6: Final answer
    x = 10,200.37

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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.