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Finding the Fourth Proportional to 12,940.66, 19,415.07 and 4,620.49

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Solution

The fourth proportional to 12,940.66, 19,415.07 and 4,620.49 is: 6,932.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.66 : 19,415.07 = 4,620.49 : x
  2. Step 2: Convert to fraction form
    12,940.66/19,415.07 = 4,620.49/x
  3. Step 3: Cross multiply
    12,940.66x = 19,415.07 × 4,620.49
  4. Step 4: Simplify right side
    12,940.66x = 89,707,184.46
  5. Step 5: Solve for x
    x = 89,707,184.46/12,940.66
  6. Step 6: Final answer
    x = 6,932.19

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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.