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Finding the Fourth Proportional to 16,435.64, 22,678.98 and 9,721.64

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Solution

The fourth proportional to 16,435.64, 22,678.98 and 9,721.64 is: 13,414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,435.64 : 22,678.98 = 9,721.64 : x
  2. Step 2: Convert to fraction form
    16,435.64/22,678.98 = 9,721.64/x
  3. Step 3: Cross multiply
    16,435.64x = 22,678.98 × 9,721.64
  4. Step 4: Simplify right side
    16,435.64x = 220,476,879.13
  5. Step 5: Solve for x
    x = 220,476,879.13/16,435.64
  6. Step 6: Final answer
    x = 13,414.56

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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.