Home / 20,934.20-31,401.30-13,148.48

Finding the Fourth Proportional to 20,934.20, 31,401.30 and 13,148.48

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Solution

The fourth proportional to 20,934.20, 31,401.30 and 13,148.48 is: 19,722.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.20 : 31,401.30 = 13,148.48 : x
  2. Step 2: Convert to fraction form
    20,934.20/31,401.30 = 13,148.48/x
  3. Step 3: Cross multiply
    20,934.20x = 31,401.30 × 13,148.48
  4. Step 4: Simplify right side
    20,934.20x = 412,879,365.02
  5. Step 5: Solve for x
    x = 412,879,365.02/20,934.20
  6. Step 6: Final answer
    x = 19,722.72

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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.