Home / 21,247.39-31,869.87-8,101.09

Finding the Fourth Proportional to 21,247.39, 31,869.87 and 8,101.09

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Solution

The fourth proportional to 21,247.39, 31,869.87 and 8,101.09 is: 12,151.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.39 : 31,869.87 = 8,101.09 : x
  2. Step 2: Convert to fraction form
    21,247.39/31,869.87 = 8,101.09/x
  3. Step 3: Cross multiply
    21,247.39x = 31,869.87 × 8,101.09
  4. Step 4: Simplify right side
    21,247.39x = 258,180,685.16
  5. Step 5: Solve for x
    x = 258,180,685.16/21,247.39
  6. Step 6: Final answer
    x = 12,151.17

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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.