Home / 21,643.31-29,867.79-12,212.75

Finding the Fourth Proportional to 21,643.31, 29,867.79 and 12,212.75

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Solution

The fourth proportional to 21,643.31, 29,867.79 and 12,212.75 is: 16,853.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,643.31 : 29,867.79 = 12,212.75 : x
  2. Step 2: Convert to fraction form
    21,643.31/29,867.79 = 12,212.75/x
  3. Step 3: Cross multiply
    21,643.31x = 29,867.79 × 12,212.75
  4. Step 4: Simplify right side
    21,643.31x = 364,767,702.98
  5. Step 5: Solve for x
    x = 364,767,702.98/21,643.31
  6. Step 6: Final answer
    x = 16,853.60

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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.