Home / 20,399.45-28,152.26-12,747.34

Finding the Fourth Proportional to 20,399.45, 28,152.26 and 12,747.34

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Solution

The fourth proportional to 20,399.45, 28,152.26 and 12,747.34 is: 17,591.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.45 : 28,152.26 = 12,747.34 : x
  2. Step 2: Convert to fraction form
    20,399.45/28,152.26 = 12,747.34/x
  3. Step 3: Cross multiply
    20,399.45x = 28,152.26 × 12,747.34
  4. Step 4: Simplify right side
    20,399.45x = 358,866,449.24
  5. Step 5: Solve for x
    x = 358,866,449.24/20,399.45
  6. Step 6: Final answer
    x = 17,591.97

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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.