Home / 21,296.22-31,940.20-8,145.51

Finding the Fourth Proportional to 21,296.22, 31,940.20 and 8,145.51

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Solution

The fourth proportional to 21,296.22, 31,940.20 and 8,145.51 is: 12,216.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,296.22 : 31,940.20 = 8,145.51 : x
  2. Step 2: Convert to fraction form
    21,296.22/31,940.20 = 8,145.51/x
  3. Step 3: Cross multiply
    21,296.22x = 31,940.20 × 8,145.51
  4. Step 4: Simplify right side
    21,296.22x = 260,169,218.50
  5. Step 5: Solve for x
    x = 260,169,218.50/21,296.22
  6. Step 6: Final answer
    x = 12,216.69

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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.