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Finding the Fourth Proportional to 16,221.66, 22,391.49 and 9,509.46

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Solution

The fourth proportional to 16,221.66, 22,391.49 and 9,509.46 is: 13,126.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,221.66 : 22,391.49 = 9,509.46 : x
  2. Step 2: Convert to fraction form
    16,221.66/22,391.49 = 9,509.46/x
  3. Step 3: Cross multiply
    16,221.66x = 22,391.49 × 9,509.46
  4. Step 4: Simplify right side
    16,221.66x = 212,930,978.50
  5. Step 5: Solve for x
    x = 212,930,978.50/16,221.66
  6. Step 6: Final answer
    x = 13,126.34

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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.