Home / 20,723.30-31,084.39-5,140.74

Finding the Fourth Proportional to 20,723.30, 31,084.39 and 5,140.74

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Solution

The fourth proportional to 20,723.30, 31,084.39 and 5,140.74 is: 7,710.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.30 : 31,084.39 = 5,140.74 : x
  2. Step 2: Convert to fraction form
    20,723.30/31,084.39 = 5,140.74/x
  3. Step 3: Cross multiply
    20,723.30x = 31,084.39 × 5,140.74
  4. Step 4: Simplify right side
    20,723.30x = 159,796,767.05
  5. Step 5: Solve for x
    x = 159,796,767.05/20,723.30
  6. Step 6: Final answer
    x = 7,710.97

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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.