Home / 15,279.09-21,056.61-11,916.60

Finding the Fourth Proportional to 15,279.09, 21,056.61 and 11,916.60

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Solution

The fourth proportional to 15,279.09, 21,056.61 and 11,916.60 is: 16,422.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.09 : 21,056.61 = 11,916.60 : x
  2. Step 2: Convert to fraction form
    15,279.09/21,056.61 = 11,916.60/x
  3. Step 3: Cross multiply
    15,279.09x = 21,056.61 × 11,916.60
  4. Step 4: Simplify right side
    15,279.09x = 250,923,198.73
  5. Step 5: Solve for x
    x = 250,923,198.73/15,279.09
  6. Step 6: Final answer
    x = 16,422.65

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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.