Home / 12,220.68-16,867.88-11,389.62

Finding the Fourth Proportional to 12,220.68, 16,867.88 and 11,389.62

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Solution

The fourth proportional to 12,220.68, 16,867.88 and 11,389.62 is: 15,720.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.68 : 16,867.88 = 11,389.62 : x
  2. Step 2: Convert to fraction form
    12,220.68/16,867.88 = 11,389.62/x
  3. Step 3: Cross multiply
    12,220.68x = 16,867.88 × 11,389.62
  4. Step 4: Simplify right side
    12,220.68x = 192,118,743.41
  5. Step 5: Solve for x
    x = 192,118,743.41/12,220.68
  6. Step 6: Final answer
    x = 15,720.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.