Home / 21,255.82-31,882.82-8,772.30

Finding the Fourth Proportional to 21,255.82, 31,882.82 and 8,772.30

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Solution

The fourth proportional to 21,255.82, 31,882.82 and 8,772.30 is: 13,158.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.82 : 31,882.82 = 8,772.30 : x
  2. Step 2: Convert to fraction form
    21,255.82/31,882.82 = 8,772.30/x
  3. Step 3: Cross multiply
    21,255.82x = 31,882.82 × 8,772.30
  4. Step 4: Simplify right side
    21,255.82x = 279,685,618.02
  5. Step 5: Solve for x
    x = 279,685,618.02/21,255.82
  6. Step 6: Final answer
    x = 13,158.07

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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.