Home / 21,209.60-29,272.32-13,653.44

Finding the Fourth Proportional to 21,209.60, 29,272.32 and 13,653.44

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Solution

The fourth proportional to 21,209.60, 29,272.32 and 13,653.44 is: 18,843.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.60 : 29,272.32 = 13,653.44 : x
  2. Step 2: Convert to fraction form
    21,209.60/29,272.32 = 13,653.44/x
  3. Step 3: Cross multiply
    21,209.60x = 29,272.32 × 13,653.44
  4. Step 4: Simplify right side
    21,209.60x = 399,667,864.78
  5. Step 5: Solve for x
    x = 399,667,864.78/21,209.60
  6. Step 6: Final answer
    x = 18,843.72

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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.