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Finding the Fourth Proportional to 21,955.97, 32,939.20 and 7,164.92

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Solution

The fourth proportional to 21,955.97, 32,939.20 and 7,164.92 is: 10,749.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.97 : 32,939.20 = 7,164.92 : x
  2. Step 2: Convert to fraction form
    21,955.97/32,939.20 = 7,164.92/x
  3. Step 3: Cross multiply
    21,955.97x = 32,939.20 × 7,164.92
  4. Step 4: Simplify right side
    21,955.97x = 236,006,536.82
  5. Step 5: Solve for x
    x = 236,006,536.82/21,955.97
  6. Step 6: Final answer
    x = 10,749.08

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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.