Home / 15,515.26-21,405.80-10,215.44

Finding the Fourth Proportional to 15,515.26, 21,405.80 and 10,215.44

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Solution

The fourth proportional to 15,515.26, 21,405.80 and 10,215.44 is: 14,093.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.26 : 21,405.80 = 10,215.44 : x
  2. Step 2: Convert to fraction form
    15,515.26/21,405.80 = 10,215.44/x
  3. Step 3: Cross multiply
    15,515.26x = 21,405.80 × 10,215.44
  4. Step 4: Simplify right side
    15,515.26x = 218,669,665.55
  5. Step 5: Solve for x
    x = 218,669,665.55/15,515.26
  6. Step 6: Final answer
    x = 14,093.84

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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.