Home / 12,412.20-18,618.24-3,178.20

Finding the Fourth Proportional to 12,412.20, 18,618.24 and 3,178.20

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Solution

The fourth proportional to 12,412.20, 18,618.24 and 3,178.20 is: 4,767.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,412.20 : 18,618.24 = 3,178.20 : x
  2. Step 2: Convert to fraction form
    12,412.20/18,618.24 = 3,178.20/x
  3. Step 3: Cross multiply
    12,412.20x = 18,618.24 × 3,178.20
  4. Step 4: Simplify right side
    12,412.20x = 59,172,490.37
  5. Step 5: Solve for x
    x = 59,172,490.37/12,412.20
  6. Step 6: Final answer
    x = 4,767.28

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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.