Home / 21,639.36-29,863.71-12,207.72

Finding the Fourth Proportional to 21,639.36, 29,863.71 and 12,207.72

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Solution

The fourth proportional to 21,639.36, 29,863.71 and 12,207.72 is: 16,847.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.36 : 29,863.71 = 12,207.72 : x
  2. Step 2: Convert to fraction form
    21,639.36/29,863.71 = 12,207.72/x
  3. Step 3: Cross multiply
    21,639.36x = 29,863.71 × 12,207.72
  4. Step 4: Simplify right side
    21,639.36x = 364,567,809.84
  5. Step 5: Solve for x
    x = 364,567,809.84/21,639.36
  6. Step 6: Final answer
    x = 16,847.44

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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.