Home / 13,719.20-18,932.58-7,431.57

Finding the Fourth Proportional to 13,719.20, 18,932.58 and 7,431.57

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Solution

The fourth proportional to 13,719.20, 18,932.58 and 7,431.57 is: 10,255.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.20 : 18,932.58 = 7,431.57 : x
  2. Step 2: Convert to fraction form
    13,719.20/18,932.58 = 7,431.57/x
  3. Step 3: Cross multiply
    13,719.20x = 18,932.58 × 7,431.57
  4. Step 4: Simplify right side
    13,719.20x = 140,698,793.55
  5. Step 5: Solve for x
    x = 140,698,793.55/13,719.20
  6. Step 6: Final answer
    x = 10,255.62

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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.