Home / 4,989.72-6,887.40-3,221.30

Finding the Fourth Proportional to 4,989.72, 6,887.40 and 3,221.30

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Solution

The fourth proportional to 4,989.72, 6,887.40 and 3,221.30 is: 4,446.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.72 : 6,887.40 = 3,221.30 : x
  2. Step 2: Convert to fraction form
    4,989.72/6,887.40 = 3,221.30/x
  3. Step 3: Cross multiply
    4,989.72x = 6,887.40 × 3,221.30
  4. Step 4: Simplify right side
    4,989.72x = 22,186,381.62
  5. Step 5: Solve for x
    x = 22,186,381.62/4,989.72
  6. Step 6: Final answer
    x = 4,446.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.