Home / 21,164.13-31,733.82-7,121.47

Finding the Fourth Proportional to 21,164.13, 31,733.82 and 7,121.47

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Solution

The fourth proportional to 21,164.13, 31,733.82 and 7,121.47 is: 10,678.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,164.13 : 31,733.82 = 7,121.47 : x
  2. Step 2: Convert to fraction form
    21,164.13/31,733.82 = 7,121.47/x
  3. Step 3: Cross multiply
    21,164.13x = 31,733.82 × 7,121.47
  4. Step 4: Simplify right side
    21,164.13x = 225,991,252.84
  5. Step 5: Solve for x
    x = 225,991,252.84/21,164.13
  6. Step 6: Final answer
    x = 10,678.03

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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.