Home / 12,455.28-18,682.88-3,689.51

Finding the Fourth Proportional to 12,455.28, 18,682.88 and 3,689.51

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Solution

The fourth proportional to 12,455.28, 18,682.88 and 3,689.51 is: 5,534.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.28 : 18,682.88 = 3,689.51 : x
  2. Step 2: Convert to fraction form
    12,455.28/18,682.88 = 3,689.51/x
  3. Step 3: Cross multiply
    12,455.28x = 18,682.88 × 3,689.51
  4. Step 4: Simplify right side
    12,455.28x = 68,930,560.73
  5. Step 5: Solve for x
    x = 68,930,560.73/12,455.28
  6. Step 6: Final answer
    x = 5,534.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.