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Finding the Fourth Proportional to 21,668.57, 29,904.01 and 12,108.48

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Solution

The fourth proportional to 21,668.57, 29,904.01 and 12,108.48 is: 16,710.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668.57 : 29,904.01 = 12,108.48 : x
  2. Step 2: Convert to fraction form
    21,668.57/29,904.01 = 12,108.48/x
  3. Step 3: Cross multiply
    21,668.57x = 29,904.01 × 12,108.48
  4. Step 4: Simplify right side
    21,668.57x = 362,092,076.73
  5. Step 5: Solve for x
    x = 362,092,076.73/21,668.57
  6. Step 6: Final answer
    x = 16,710.48

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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.