Home / 20,790.42-31,129.74-15,836.46

Finding the Fourth Proportional to 20,790.42, 31,129.74 and 15,836.46

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Solution

The fourth proportional to 20,790.42, 31,129.74 and 15,836.46 is: 23,712.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.42 : 31,129.74 = 15,836.46 : x
  2. Step 2: Convert to fraction form
    20,790.42/31,129.74 = 15,836.46/x
  3. Step 3: Cross multiply
    20,790.42x = 31,129.74 × 15,836.46
  4. Step 4: Simplify right side
    20,790.42x = 492,984,882.32
  5. Step 5: Solve for x
    x = 492,984,882.32/20,790.42
  6. Step 6: Final answer
    x = 23,712.12

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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.