Home / 20,805.07-31,207.32-5,222.71

Finding the Fourth Proportional to 20,805.07, 31,207.32 and 5,222.71

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Solution

The fourth proportional to 20,805.07, 31,207.32 and 5,222.71 is: 7,833.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.07 : 31,207.32 = 5,222.71 : x
  2. Step 2: Convert to fraction form
    20,805.07/31,207.32 = 5,222.71/x
  3. Step 3: Cross multiply
    20,805.07x = 31,207.32 × 5,222.71
  4. Step 4: Simplify right side
    20,805.07x = 162,986,782.24
  5. Step 5: Solve for x
    x = 162,986,782.24/20,805.07
  6. Step 6: Final answer
    x = 7,833.99

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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.