Home / 21,221.92-31,836.56-8,075.44

Finding the Fourth Proportional to 21,221.92, 31,836.56 and 8,075.44

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Solution

The fourth proportional to 21,221.92, 31,836.56 and 8,075.44 is: 12,114.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.92 : 31,836.56 = 8,075.44 : x
  2. Step 2: Convert to fraction form
    21,221.92/31,836.56 = 8,075.44/x
  3. Step 3: Cross multiply
    21,221.92x = 31,836.56 × 8,075.44
  4. Step 4: Simplify right side
    21,221.92x = 257,094,230.09
  5. Step 5: Solve for x
    x = 257,094,230.09/21,221.92
  6. Step 6: Final answer
    x = 12,114.56

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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.