Home / 40,135.80-60,240.72-20,428.56

Finding the Fourth Proportional to 40,135.80, 60,240.72 and 20,428.56

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Solution

The fourth proportional to 40,135.80, 60,240.72 and 20,428.56 is: 30,661.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,135.80 : 60,240.72 = 20,428.56 : x
  2. Step 2: Convert to fraction form
    40,135.80/60,240.72 = 20,428.56/x
  3. Step 3: Cross multiply
    40,135.80x = 60,240.72 × 20,428.56
  4. Step 4: Simplify right side
    40,135.80x = 1,230,631,162.96
  5. Step 5: Solve for x
    x = 1,230,631,162.96/40,135.80
  6. Step 6: Final answer
    x = 30,661.68

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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.