Home / 12,989.17-19,479.61-4,221.97

Finding the Fourth Proportional to 12,989.17, 19,479.61 and 4,221.97

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Solution

The fourth proportional to 12,989.17, 19,479.61 and 4,221.97 is: 6,331.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.17 : 19,479.61 = 4,221.97 : x
  2. Step 2: Convert to fraction form
    12,989.17/19,479.61 = 4,221.97/x
  3. Step 3: Cross multiply
    12,989.17x = 19,479.61 × 4,221.97
  4. Step 4: Simplify right side
    12,989.17x = 82,242,329.03
  5. Step 5: Solve for x
    x = 82,242,329.03/12,989.17
  6. Step 6: Final answer
    x = 6,331.61

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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.