Home / 15,868.82-21,899.85-8,795.09

Finding the Fourth Proportional to 15,868.82, 21,899.85 and 8,795.09

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Solution

The fourth proportional to 15,868.82, 21,899.85 and 8,795.09 is: 12,137.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.82 : 21,899.85 = 8,795.09 : x
  2. Step 2: Convert to fraction form
    15,868.82/21,899.85 = 8,795.09/x
  3. Step 3: Cross multiply
    15,868.82x = 21,899.85 × 8,795.09
  4. Step 4: Simplify right side
    15,868.82x = 192,611,151.74
  5. Step 5: Solve for x
    x = 192,611,151.74/15,868.82
  6. Step 6: Final answer
    x = 12,137.71

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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.