Home / 20,289.45-30,434.22-7,138.83

Finding the Fourth Proportional to 20,289.45, 30,434.22 and 7,138.83

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Solution

The fourth proportional to 20,289.45, 30,434.22 and 7,138.83 is: 10,708.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.45 : 30,434.22 = 7,138.83 : x
  2. Step 2: Convert to fraction form
    20,289.45/30,434.22 = 7,138.83/x
  3. Step 3: Cross multiply
    20,289.45x = 30,434.22 × 7,138.83
  4. Step 4: Simplify right side
    20,289.45x = 217,264,722.76
  5. Step 5: Solve for x
    x = 217,264,722.76/20,289.45
  6. Step 6: Final answer
    x = 10,708.26

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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.