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Finding the Fourth Proportional to 19,409.22, 26,787.60 and 11,859.90

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Solution

The fourth proportional to 19,409.22, 26,787.60 and 11,859.90 is: 16,368.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,409.22 : 26,787.60 = 11,859.90 : x
  2. Step 2: Convert to fraction form
    19,409.22/26,787.60 = 11,859.90/x
  3. Step 3: Cross multiply
    19,409.22x = 26,787.60 × 11,859.90
  4. Step 4: Simplify right side
    19,409.22x = 317,698,257.24
  5. Step 5: Solve for x
    x = 317,698,257.24/19,409.22
  6. Step 6: Final answer
    x = 16,368.42

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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.