Home / 20,797.20-31,195.80-19,112.40

Finding the Fourth Proportional to 20,797.20, 31,195.80 and 19,112.40

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Solution

The fourth proportional to 20,797.20, 31,195.80 and 19,112.40 is: 28,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.20 : 31,195.80 = 19,112.40 : x
  2. Step 2: Convert to fraction form
    20,797.20/31,195.80 = 19,112.40/x
  3. Step 3: Cross multiply
    20,797.20x = 31,195.80 × 19,112.40
  4. Step 4: Simplify right side
    20,797.20x = 596,226,607.92
  5. Step 5: Solve for x
    x = 596,226,607.92/20,797.20
  6. Step 6: Final answer
    x = 28,668.60

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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.