Home / 31,814.21-43,874.29-21,620.46

Finding the Fourth Proportional to 31,814.21, 43,874.29 and 21,620.46

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Solution

The fourth proportional to 31,814.21, 43,874.29 and 21,620.46 is: 29,816.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,814.21 : 43,874.29 = 21,620.46 : x
  2. Step 2: Convert to fraction form
    31,814.21/43,874.29 = 21,620.46/x
  3. Step 3: Cross multiply
    31,814.21x = 43,874.29 × 21,620.46
  4. Step 4: Simplify right side
    31,814.21x = 948,582,239.84
  5. Step 5: Solve for x
    x = 948,582,239.84/31,814.21
  6. Step 6: Final answer
    x = 29,816.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.