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Finding the Fourth Proportional to 12,151.08, 18,226.08 and 5,128.20

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Solution

The fourth proportional to 12,151.08, 18,226.08 and 5,128.20 is: 7,692.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,151.08 : 18,226.08 = 5,128.20 : x
  2. Step 2: Convert to fraction form
    12,151.08/18,226.08 = 5,128.20/x
  3. Step 3: Cross multiply
    12,151.08x = 18,226.08 × 5,128.20
  4. Step 4: Simplify right side
    12,151.08x = 93,466,983.46
  5. Step 5: Solve for x
    x = 93,466,983.46/12,151.08
  6. Step 6: Final answer
    x = 7,692.07

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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.