Home / 20,797.72-31,197.54-5,215.48

Finding the Fourth Proportional to 20,797.72, 31,197.54 and 5,215.48

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Solution

The fourth proportional to 20,797.72, 31,197.54 and 5,215.48 is: 7,823.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.72 : 31,197.54 = 5,215.48 : x
  2. Step 2: Convert to fraction form
    20,797.72/31,197.54 = 5,215.48/x
  3. Step 3: Cross multiply
    20,797.72x = 31,197.54 × 5,215.48
  4. Step 4: Simplify right side
    20,797.72x = 162,710,145.92
  5. Step 5: Solve for x
    x = 162,710,145.92/20,797.72
  6. Step 6: Final answer
    x = 7,823.46

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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.