Home / 13,958.48-20,885.42-8,315.54

Finding the Fourth Proportional to 13,958.48, 20,885.42 and 8,315.54

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Solution

The fourth proportional to 13,958.48, 20,885.42 and 8,315.54 is: 12,442.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.48 : 20,885.42 = 8,315.54 : x
  2. Step 2: Convert to fraction form
    13,958.48/20,885.42 = 8,315.54/x
  3. Step 3: Cross multiply
    13,958.48x = 20,885.42 × 8,315.54
  4. Step 4: Simplify right side
    13,958.48x = 173,673,545.43
  5. Step 5: Solve for x
    x = 173,673,545.43/13,958.48
  6. Step 6: Final answer
    x = 12,442.15

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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.