Home / 19,664.28-27,155.99-16,815.21

Finding the Fourth Proportional to 19,664.28, 27,155.99 and 16,815.21

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Solution

The fourth proportional to 19,664.28, 27,155.99 and 16,815.21 is: 23,221.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,664.28 : 27,155.99 = 16,815.21 : x
  2. Step 2: Convert to fraction form
    19,664.28/27,155.99 = 16,815.21/x
  3. Step 3: Cross multiply
    19,664.28x = 27,155.99 × 16,815.21
  4. Step 4: Simplify right side
    19,664.28x = 456,633,590.53
  5. Step 5: Solve for x
    x = 456,633,590.53/19,664.28
  6. Step 6: Final answer
    x = 23,221.48

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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.