Home / 20,760.84-31,141.26-5,178.60

Finding the Fourth Proportional to 20,760.84, 31,141.26 and 5,178.60

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Solution

The fourth proportional to 20,760.84, 31,141.26 and 5,178.60 is: 7,767.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.84 : 31,141.26 = 5,178.60 : x
  2. Step 2: Convert to fraction form
    20,760.84/31,141.26 = 5,178.60/x
  3. Step 3: Cross multiply
    20,760.84x = 31,141.26 × 5,178.60
  4. Step 4: Simplify right side
    20,760.84x = 161,268,129.04
  5. Step 5: Solve for x
    x = 161,268,129.04/20,760.84
  6. Step 6: Final answer
    x = 7,767.90

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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.