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Finding the Fourth Proportional to 22,339.32, 30,828.98 and 12,907.88

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Solution

The fourth proportional to 22,339.32, 30,828.98 and 12,907.88 is: 17,813.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,339.32 : 30,828.98 = 12,907.88 : x
  2. Step 2: Convert to fraction form
    22,339.32/30,828.98 = 12,907.88/x
  3. Step 3: Cross multiply
    22,339.32x = 30,828.98 × 12,907.88
  4. Step 4: Simplify right side
    22,339.32x = 397,936,774.36
  5. Step 5: Solve for x
    x = 397,936,774.36/22,339.32
  6. Step 6: Final answer
    x = 17,813.29

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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.