Home / 21,175.20-31,762.80-19,231.20

Finding the Fourth Proportional to 21,175.20, 31,762.80 and 19,231.20

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Solution

The fourth proportional to 21,175.20, 31,762.80 and 19,231.20 is: 28,846.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,175.20 : 31,762.80 = 19,231.20 : x
  2. Step 2: Convert to fraction form
    21,175.20/31,762.80 = 19,231.20/x
  3. Step 3: Cross multiply
    21,175.20x = 31,762.80 × 19,231.20
  4. Step 4: Simplify right side
    21,175.20x = 610,836,759.36
  5. Step 5: Solve for x
    x = 610,836,759.36/21,175.20
  6. Step 6: Final answer
    x = 28,846.80

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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.