Home / 20,908.06-31,389.90-12,149.26

Finding the Fourth Proportional to 20,908.06, 31,389.90 and 12,149.26

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Solution

The fourth proportional to 20,908.06, 31,389.90 and 12,149.26 is: 18,240.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.06 : 31,389.90 = 12,149.26 : x
  2. Step 2: Convert to fraction form
    20,908.06/31,389.90 = 12,149.26/x
  3. Step 3: Cross multiply
    20,908.06x = 31,389.90 × 12,149.26
  4. Step 4: Simplify right side
    20,908.06x = 381,364,056.47
  5. Step 5: Solve for x
    x = 381,364,056.47/20,908.06
  6. Step 6: Final answer
    x = 18,240.05

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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.