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Finding the Fourth Proportional to 21,591, 29,796.36 and 12,031.32

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Solution

The fourth proportional to 21,591, 29,796.36 and 12,031.32 is: 16,603.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591 : 29,796.36 = 12,031.32 : x
  2. Step 2: Convert to fraction form
    21,591/29,796.36 = 12,031.32/x
  3. Step 3: Cross multiply
    21,591x = 29,796.36 × 12,031.32
  4. Step 4: Simplify right side
    21,591x = 358,489,542.00
  5. Step 5: Solve for x
    x = 358,489,542.00/21,591
  6. Step 6: Final answer
    x = 16,603.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.