Home / 13,634.18-18,815.20-7,665.90

Finding the Fourth Proportional to 13,634.18, 18,815.20 and 7,665.90

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Solution

The fourth proportional to 13,634.18, 18,815.20 and 7,665.90 is: 10,578.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,634.18 : 18,815.20 = 7,665.90 : x
  2. Step 2: Convert to fraction form
    13,634.18/18,815.20 = 7,665.90/x
  3. Step 3: Cross multiply
    13,634.18x = 18,815.20 × 7,665.90
  4. Step 4: Simplify right side
    13,634.18x = 144,235,441.68
  5. Step 5: Solve for x
    x = 144,235,441.68/13,634.18
  6. Step 6: Final answer
    x = 10,578.96

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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.