Home / 21,721.56-32,546.57-19,905.81

Finding the Fourth Proportional to 21,721.56, 32,546.57 and 19,905.81

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Solution

The fourth proportional to 21,721.56, 32,546.57 and 19,905.81 is: 29,825.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.56 : 32,546.57 = 19,905.81 : x
  2. Step 2: Convert to fraction form
    21,721.56/32,546.57 = 19,905.81/x
  3. Step 3: Cross multiply
    21,721.56x = 32,546.57 × 19,905.81
  4. Step 4: Simplify right side
    21,721.56x = 647,865,739.04
  5. Step 5: Solve for x
    x = 647,865,739.04/21,721.56
  6. Step 6: Final answer
    x = 29,825.93

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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.