Home / 13,809.12-20,715.98-5,489.22

Finding the Fourth Proportional to 13,809.12, 20,715.98 and 5,489.22

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Solution

The fourth proportional to 13,809.12, 20,715.98 and 5,489.22 is: 8,234.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,809.12 : 20,715.98 = 5,489.22 : x
  2. Step 2: Convert to fraction form
    13,809.12/20,715.98 = 5,489.22/x
  3. Step 3: Cross multiply
    13,809.12x = 20,715.98 × 5,489.22
  4. Step 4: Simplify right side
    13,809.12x = 113,714,520.89
  5. Step 5: Solve for x
    x = 113,714,520.89/13,809.12
  6. Step 6: Final answer
    x = 8,234.74

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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.