Home / 13,911.30-20,860.70-8,291.62

Finding the Fourth Proportional to 13,911.30, 20,860.70 and 8,291.62

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Solution

The fourth proportional to 13,911.30, 20,860.70 and 8,291.62 is: 12,433.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911.30 : 20,860.70 = 8,291.62 : x
  2. Step 2: Convert to fraction form
    13,911.30/20,860.70 = 8,291.62/x
  3. Step 3: Cross multiply
    13,911.30x = 20,860.70 × 8,291.62
  4. Step 4: Simplify right side
    13,911.30x = 172,968,997.33
  5. Step 5: Solve for x
    x = 172,968,997.33/13,911.30
  6. Step 6: Final answer
    x = 12,433.70

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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.