Home / 20,432.05-30,640.07-7,950.42

Finding the Fourth Proportional to 20,432.05, 30,640.07 and 7,950.42

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Solution

The fourth proportional to 20,432.05, 30,640.07 and 7,950.42 is: 11,922.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.05 : 30,640.07 = 7,950.42 : x
  2. Step 2: Convert to fraction form
    20,432.05/30,640.07 = 7,950.42/x
  3. Step 3: Cross multiply
    20,432.05x = 30,640.07 × 7,950.42
  4. Step 4: Simplify right side
    20,432.05x = 243,601,445.21
  5. Step 5: Solve for x
    x = 243,601,445.21/20,432.05
  6. Step 6: Final answer
    x = 11,922.52

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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.