Home / 21,828.40-32,791.20-20,942.80

Finding the Fourth Proportional to 21,828.40, 32,791.20 and 20,942.80

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Solution

The fourth proportional to 21,828.40, 32,791.20 and 20,942.80 is: 31,460.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.40 : 32,791.20 = 20,942.80 : x
  2. Step 2: Convert to fraction form
    21,828.40/32,791.20 = 20,942.80/x
  3. Step 3: Cross multiply
    21,828.40x = 32,791.20 × 20,942.80
  4. Step 4: Simplify right side
    21,828.40x = 686,739,543.36
  5. Step 5: Solve for x
    x = 686,739,543.36/21,828.40
  6. Step 6: Final answer
    x = 31,460.83

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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.