Home / 13,859.12-20,766.32-8,309.92

Finding the Fourth Proportional to 13,859.12, 20,766.32 and 8,309.92

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Solution

The fourth proportional to 13,859.12, 20,766.32 and 8,309.92 is: 12,451.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.12 : 20,766.32 = 8,309.92 : x
  2. Step 2: Convert to fraction form
    13,859.12/20,766.32 = 8,309.92/x
  3. Step 3: Cross multiply
    13,859.12x = 20,766.32 × 8,309.92
  4. Step 4: Simplify right side
    13,859.12x = 172,566,457.89
  5. Step 5: Solve for x
    x = 172,566,457.89/13,859.12
  6. Step 6: Final answer
    x = 12,451.47

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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.