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Finding the Fourth Proportional to 12,618.99, 18,912.08 and 6,768.77

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Solution

The fourth proportional to 12,618.99, 18,912.08 and 6,768.77 is: 10,144.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.99 : 18,912.08 = 6,768.77 : x
  2. Step 2: Convert to fraction form
    12,618.99/18,912.08 = 6,768.77/x
  3. Step 3: Cross multiply
    12,618.99x = 18,912.08 × 6,768.77
  4. Step 4: Simplify right side
    12,618.99x = 128,011,442.10
  5. Step 5: Solve for x
    x = 128,011,442.10/12,618.99
  6. Step 6: Final answer
    x = 10,144.35

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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.