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Finding the Fourth Proportional to 21,288.70, 32,092.48 and 19,861.48

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Solution

The fourth proportional to 21,288.70, 32,092.48 and 19,861.48 is: 29,940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.70 : 32,092.48 = 19,861.48 : x
  2. Step 2: Convert to fraction form
    21,288.70/32,092.48 = 19,861.48/x
  3. Step 3: Cross multiply
    21,288.70x = 32,092.48 × 19,861.48
  4. Step 4: Simplify right side
    21,288.70x = 637,404,149.67
  5. Step 5: Solve for x
    x = 637,404,149.67/21,288.70
  6. Step 6: Final answer
    x = 29,940.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.