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Finding the Fourth Proportional to 21,635.58, 29,856.51 and 12,205.02

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Solution

The fourth proportional to 21,635.58, 29,856.51 and 12,205.02 is: 16,842.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,635.58 : 29,856.51 = 12,205.02 : x
  2. Step 2: Convert to fraction form
    21,635.58/29,856.51 = 12,205.02/x
  3. Step 3: Cross multiply
    21,635.58x = 29,856.51 × 12,205.02
  4. Step 4: Simplify right side
    21,635.58x = 364,399,301.68
  5. Step 5: Solve for x
    x = 364,399,301.68/21,635.58
  6. Step 6: Final answer
    x = 16,842.59

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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.