Home / 21,591.36-29,796.66-12,159.72

Finding the Fourth Proportional to 21,591.36, 29,796.66 and 12,159.72

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Solution

The fourth proportional to 21,591.36, 29,796.66 and 12,159.72 is: 16,780.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.36 : 29,796.66 = 12,159.72 : x
  2. Step 2: Convert to fraction form
    21,591.36/29,796.66 = 12,159.72/x
  3. Step 3: Cross multiply
    21,591.36x = 29,796.66 × 12,159.72
  4. Step 4: Simplify right side
    21,591.36x = 362,319,042.54
  5. Step 5: Solve for x
    x = 362,319,042.54/21,591.36
  6. Step 6: Final answer
    x = 16,780.74

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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.