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Finding the Fourth Proportional to 16,391.45, 22,619.54 and 9,679.24

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Solution

The fourth proportional to 16,391.45, 22,619.54 and 9,679.24 is: 13,356.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,391.45 : 22,619.54 = 9,679.24 : x
  2. Step 2: Convert to fraction form
    16,391.45/22,619.54 = 9,679.24/x
  3. Step 3: Cross multiply
    16,391.45x = 22,619.54 × 9,679.24
  4. Step 4: Simplify right side
    16,391.45x = 218,939,887.70
  5. Step 5: Solve for x
    x = 218,939,887.70/16,391.45
  6. Step 6: Final answer
    x = 13,356.96

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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.