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Finding the Fourth Proportional to 12,622.52, 18,921.02 and 5,216.76

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Solution

The fourth proportional to 12,622.52, 18,921.02 and 5,216.76 is: 7,819.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,622.52 : 18,921.02 = 5,216.76 : x
  2. Step 2: Convert to fraction form
    12,622.52/18,921.02 = 5,216.76/x
  3. Step 3: Cross multiply
    12,622.52x = 18,921.02 × 5,216.76
  4. Step 4: Simplify right side
    12,622.52x = 98,706,420.30
  5. Step 5: Solve for x
    x = 98,706,420.30/12,622.52
  6. Step 6: Final answer
    x = 7,819.87

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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.