Home / 12,455.79-18,683.76-3,690.78

Finding the Fourth Proportional to 12,455.79, 18,683.76 and 3,690.78

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Solution

The fourth proportional to 12,455.79, 18,683.76 and 3,690.78 is: 5,536.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.79 : 18,683.76 = 3,690.78 : x
  2. Step 2: Convert to fraction form
    12,455.79/18,683.76 = 3,690.78/x
  3. Step 3: Cross multiply
    12,455.79x = 18,683.76 × 3,690.78
  4. Step 4: Simplify right side
    12,455.79x = 68,957,647.73
  5. Step 5: Solve for x
    x = 68,957,647.73/12,455.79
  6. Step 6: Final answer
    x = 5,536.19

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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.