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Finding the Fourth Proportional to 12,366.78, 18,550.17 and 4,158.78

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Solution

The fourth proportional to 12,366.78, 18,550.17 and 4,158.78 is: 6,238.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,366.78 : 18,550.17 = 4,158.78 : x
  2. Step 2: Convert to fraction form
    12,366.78/18,550.17 = 4,158.78/x
  3. Step 3: Cross multiply
    12,366.78x = 18,550.17 × 4,158.78
  4. Step 4: Simplify right side
    12,366.78x = 77,146,075.99
  5. Step 5: Solve for x
    x = 77,146,075.99/12,366.78
  6. Step 6: Final answer
    x = 6,238.17

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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.