Home / 21,209.60-29,255.80-13,029.62

Finding the Fourth Proportional to 21,209.60, 29,255.80 and 13,029.62

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Solution

The fourth proportional to 21,209.60, 29,255.80 and 13,029.62 is: 17,972.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.60 : 29,255.80 = 13,029.62 : x
  2. Step 2: Convert to fraction form
    21,209.60/29,255.80 = 13,029.62/x
  3. Step 3: Cross multiply
    21,209.60x = 29,255.80 × 13,029.62
  4. Step 4: Simplify right side
    21,209.60x = 381,191,956.80
  5. Step 5: Solve for x
    x = 381,191,956.80/21,209.60
  6. Step 6: Final answer
    x = 17,972.61

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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.