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Finding the Fourth Proportional to 21,603.66, 29,821.41 and 16,889.46

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Solution

The fourth proportional to 21,603.66, 29,821.41 and 16,889.46 is: 23,313.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.66 : 29,821.41 = 16,889.46 : x
  2. Step 2: Convert to fraction form
    21,603.66/29,821.41 = 16,889.46/x
  3. Step 3: Cross multiply
    21,603.66x = 29,821.41 × 16,889.46
  4. Step 4: Simplify right side
    21,603.66x = 503,667,511.34
  5. Step 5: Solve for x
    x = 503,667,511.34/21,603.66
  6. Step 6: Final answer
    x = 23,313.99

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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.