Home / 21,079.68-31,629.96-8,608.56

Finding the Fourth Proportional to 21,079.68, 31,629.96 and 8,608.56

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Solution

The fourth proportional to 21,079.68, 31,629.96 and 8,608.56 is: 12,917.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.68 : 31,629.96 = 8,608.56 : x
  2. Step 2: Convert to fraction form
    21,079.68/31,629.96 = 8,608.56/x
  3. Step 3: Cross multiply
    21,079.68x = 31,629.96 × 8,608.56
  4. Step 4: Simplify right side
    21,079.68x = 272,288,408.46
  5. Step 5: Solve for x
    x = 272,288,408.46/21,079.68
  6. Step 6: Final answer
    x = 12,917.10

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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.