Home / 21,785.09-32,690.39-8,635.82

Finding the Fourth Proportional to 21,785.09, 32,690.39 and 8,635.82

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Solution

The fourth proportional to 21,785.09, 32,690.39 and 8,635.82 is: 12,958.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,785.09 : 32,690.39 = 8,635.82 : x
  2. Step 2: Convert to fraction form
    21,785.09/32,690.39 = 8,635.82/x
  3. Step 3: Cross multiply
    21,785.09x = 32,690.39 × 8,635.82
  4. Step 4: Simplify right side
    21,785.09x = 282,308,117.14
  5. Step 5: Solve for x
    x = 282,308,117.14/21,785.09
  6. Step 6: Final answer
    x = 12,958.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.