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Finding the Fourth Proportional to 21,963.01, 32,937.70 and 7,921.21

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Solution

The fourth proportional to 21,963.01, 32,937.70 and 7,921.21 is: 11,879.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,963.01 : 32,937.70 = 7,921.21 : x
  2. Step 2: Convert to fraction form
    21,963.01/32,937.70 = 7,921.21/x
  3. Step 3: Cross multiply
    21,963.01x = 32,937.70 × 7,921.21
  4. Step 4: Simplify right side
    21,963.01x = 260,906,451.40
  5. Step 5: Solve for x
    x = 260,906,451.40/21,963.01
  6. Step 6: Final answer
    x = 11,879.36

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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.