Home / 20,399.46-28,138.32-14,742.54

Finding the Fourth Proportional to 20,399.46, 28,138.32 and 14,742.54

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Solution

The fourth proportional to 20,399.46, 28,138.32 and 14,742.54 is: 20,335.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.46 : 28,138.32 = 14,742.54 : x
  2. Step 2: Convert to fraction form
    20,399.46/28,138.32 = 14,742.54/x
  3. Step 3: Cross multiply
    20,399.46x = 28,138.32 × 14,742.54
  4. Step 4: Simplify right side
    20,399.46x = 414,830,308.13
  5. Step 5: Solve for x
    x = 414,830,308.13/20,399.46
  6. Step 6: Final answer
    x = 20,335.36

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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.