Home / 21,296.72-31,940.96-8,146.01

Finding the Fourth Proportional to 21,296.72, 31,940.96 and 8,146.01

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Solution

The fourth proportional to 21,296.72, 31,940.96 and 8,146.01 is: 12,217.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,296.72 : 31,940.96 = 8,146.01 : x
  2. Step 2: Convert to fraction form
    21,296.72/31,940.96 = 8,146.01/x
  3. Step 3: Cross multiply
    21,296.72x = 31,940.96 × 8,146.01
  4. Step 4: Simplify right side
    21,296.72x = 260,191,179.13
  5. Step 5: Solve for x
    x = 260,191,179.13/21,296.72
  6. Step 6: Final answer
    x = 12,217.43

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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.