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Finding the Fourth Proportional to 21,863.63, 32,791.95 and 7,821.04

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Solution

The fourth proportional to 21,863.63, 32,791.95 and 7,821.04 is: 11,730.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.63 : 32,791.95 = 7,821.04 : x
  2. Step 2: Convert to fraction form
    21,863.63/32,791.95 = 7,821.04/x
  3. Step 3: Cross multiply
    21,863.63x = 32,791.95 × 7,821.04
  4. Step 4: Simplify right side
    21,863.63x = 256,467,152.63
  5. Step 5: Solve for x
    x = 256,467,152.63/21,863.63
  6. Step 6: Final answer
    x = 11,730.31

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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.