Home / 21,078.60-31,596.30-11,704.20

Finding the Fourth Proportional to 21,078.60, 31,596.30 and 11,704.20

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Solution

The fourth proportional to 21,078.60, 31,596.30 and 11,704.20 is: 17,544.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.60 : 31,596.30 = 11,704.20 : x
  2. Step 2: Convert to fraction form
    21,078.60/31,596.30 = 11,704.20/x
  3. Step 3: Cross multiply
    21,078.60x = 31,596.30 × 11,704.20
  4. Step 4: Simplify right side
    21,078.60x = 369,809,414.46
  5. Step 5: Solve for x
    x = 369,809,414.46/21,078.60
  6. Step 6: Final answer
    x = 17,544.31

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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.