Home / 8,819.42-13,222.89-7,989.04

Finding the Fourth Proportional to 8,819.42, 13,222.89 and 7,989.04

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Solution

The fourth proportional to 8,819.42, 13,222.89 and 7,989.04 is: 11,977.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.42 : 13,222.89 = 7,989.04 : x
  2. Step 2: Convert to fraction form
    8,819.42/13,222.89 = 7,989.04/x
  3. Step 3: Cross multiply
    8,819.42x = 13,222.89 × 7,989.04
  4. Step 4: Simplify right side
    8,819.42x = 105,638,164.07
  5. Step 5: Solve for x
    x = 105,638,164.07/8,819.42
  6. Step 6: Final answer
    x = 11,977.90

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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.