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Finding the Fourth Proportional to 8,415.54, 12,622.77 and 2,572.20

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Solution

The fourth proportional to 8,415.54, 12,622.77 and 2,572.20 is: 3,858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.54 : 12,622.77 = 2,572.20 : x
  2. Step 2: Convert to fraction form
    8,415.54/12,622.77 = 2,572.20/x
  3. Step 3: Cross multiply
    8,415.54x = 12,622.77 × 2,572.20
  4. Step 4: Simplify right side
    8,415.54x = 32,468,288.99
  5. Step 5: Solve for x
    x = 32,468,288.99/8,415.54
  6. Step 6: Final answer
    x = 3,858.13

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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.