Home / 20,329.71-28,049.67-12,679.05

Finding the Fourth Proportional to 20,329.71, 28,049.67 and 12,679.05

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Solution

The fourth proportional to 20,329.71, 28,049.67 and 12,679.05 is: 17,493.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,329.71 : 28,049.67 = 12,679.05 : x
  2. Step 2: Convert to fraction form
    20,329.71/28,049.67 = 12,679.05/x
  3. Step 3: Cross multiply
    20,329.71x = 28,049.67 × 12,679.05
  4. Step 4: Simplify right side
    20,329.71x = 355,643,168.41
  5. Step 5: Solve for x
    x = 355,643,168.41/20,329.71
  6. Step 6: Final answer
    x = 17,493.76

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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.