Home / 21,619.60-29,836.86-12,190.12

Finding the Fourth Proportional to 21,619.60, 29,836.86 and 12,190.12

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Solution

The fourth proportional to 21,619.60, 29,836.86 and 12,190.12 is: 16,823.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.60 : 29,836.86 = 12,190.12 : x
  2. Step 2: Convert to fraction form
    21,619.60/29,836.86 = 12,190.12/x
  3. Step 3: Cross multiply
    21,619.60x = 29,836.86 × 12,190.12
  4. Step 4: Simplify right side
    21,619.60x = 363,714,903.82
  5. Step 5: Solve for x
    x = 363,714,903.82/21,619.60
  6. Step 6: Final answer
    x = 16,823.39

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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.