Home / 47,679.40-71,519.10-12,622.60

Finding the Fourth Proportional to 47,679.40, 71,519.10 and 12,622.60

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Solution

The fourth proportional to 47,679.40, 71,519.10 and 12,622.60 is: 18,933.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,679.40 : 71,519.10 = 12,622.60 : x
  2. Step 2: Convert to fraction form
    47,679.40/71,519.10 = 12,622.60/x
  3. Step 3: Cross multiply
    47,679.40x = 71,519.10 × 12,622.60
  4. Step 4: Simplify right side
    47,679.40x = 902,756,991.66
  5. Step 5: Solve for x
    x = 902,756,991.66/47,679.40
  6. Step 6: Final answer
    x = 18,933.90

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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.