Home / 20,420.45-30,632.56-7,941.41

Finding the Fourth Proportional to 20,420.45, 30,632.56 and 7,941.41

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Solution

The fourth proportional to 20,420.45, 30,632.56 and 7,941.41 is: 11,912.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.45 : 30,632.56 = 7,941.41 : x
  2. Step 2: Convert to fraction form
    20,420.45/30,632.56 = 7,941.41/x
  3. Step 3: Cross multiply
    20,420.45x = 30,632.56 × 7,941.41
  4. Step 4: Simplify right side
    20,420.45x = 243,265,545.29
  5. Step 5: Solve for x
    x = 243,265,545.29/20,420.45
  6. Step 6: Final answer
    x = 11,912.84

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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.