Home / 12,940.71-19,412.28-4,621.61

Finding the Fourth Proportional to 12,940.71, 19,412.28 and 4,621.61

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Solution

The fourth proportional to 12,940.71, 19,412.28 and 4,621.61 is: 6,932.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.71 : 19,412.28 = 4,621.61 : x
  2. Step 2: Convert to fraction form
    12,940.71/19,412.28 = 4,621.61/x
  3. Step 3: Cross multiply
    12,940.71x = 19,412.28 × 4,621.61
  4. Step 4: Simplify right side
    12,940.71x = 89,715,987.37
  5. Step 5: Solve for x
    x = 89,715,987.37/12,940.71
  6. Step 6: Final answer
    x = 6,932.85

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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.