Home / 15,690.58-21,672.16-11,729.27

Finding the Fourth Proportional to 15,690.58, 21,672.16 and 11,729.27

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Solution

The fourth proportional to 15,690.58, 21,672.16 and 11,729.27 is: 16,200.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.58 : 21,672.16 = 11,729.27 : x
  2. Step 2: Convert to fraction form
    15,690.58/21,672.16 = 11,729.27/x
  3. Step 3: Cross multiply
    15,690.58x = 21,672.16 × 11,729.27
  4. Step 4: Simplify right side
    15,690.58x = 254,198,640.98
  5. Step 5: Solve for x
    x = 254,198,640.98/15,690.58
  6. Step 6: Final answer
    x = 16,200.72

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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.