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Finding the Fourth Proportional to 21,887.87, 30,163.12 and 15,910.07

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Solution

The fourth proportional to 21,887.87, 30,163.12 and 15,910.07 is: 21,925.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.87 : 30,163.12 = 15,910.07 : x
  2. Step 2: Convert to fraction form
    21,887.87/30,163.12 = 15,910.07/x
  3. Step 3: Cross multiply
    21,887.87x = 30,163.12 × 15,910.07
  4. Step 4: Simplify right side
    21,887.87x = 479,897,160.03
  5. Step 5: Solve for x
    x = 479,897,160.03/21,887.87
  6. Step 6: Final answer
    x = 21,925.26

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Double scale
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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.