Home / 20,853.20-31,279.80-19,470.80

Finding the Fourth Proportional to 20,853.20, 31,279.80 and 19,470.80

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Solution

The fourth proportional to 20,853.20, 31,279.80 and 19,470.80 is: 29,206.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.20 : 31,279.80 = 19,470.80 : x
  2. Step 2: Convert to fraction form
    20,853.20/31,279.80 = 19,470.80/x
  3. Step 3: Cross multiply
    20,853.20x = 31,279.80 × 19,470.80
  4. Step 4: Simplify right side
    20,853.20x = 609,042,729.84
  5. Step 5: Solve for x
    x = 609,042,729.84/20,853.20
  6. Step 6: Final answer
    x = 29,206.20

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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.