Home / 15,855.60-21,895.44-11,869.80

Finding the Fourth Proportional to 15,855.60, 21,895.44 and 11,869.80

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Solution

The fourth proportional to 15,855.60, 21,895.44 and 11,869.80 is: 16,391.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.60 : 21,895.44 = 11,869.80 : x
  2. Step 2: Convert to fraction form
    15,855.60/21,895.44 = 11,869.80/x
  3. Step 3: Cross multiply
    15,855.60x = 21,895.44 × 11,869.80
  4. Step 4: Simplify right side
    15,855.60x = 259,894,354.56
  5. Step 5: Solve for x
    x = 259,894,354.56/15,855.60
  6. Step 6: Final answer
    x = 16,391.33

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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.