Home / 21,619.21-29,845.79-15,346.57

Finding the Fourth Proportional to 21,619.21, 29,845.79 and 15,346.57

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Solution

The fourth proportional to 21,619.21, 29,845.79 and 15,346.57 is: 21,186.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.21 : 29,845.79 = 15,346.57 : x
  2. Step 2: Convert to fraction form
    21,619.21/29,845.79 = 15,346.57/x
  3. Step 3: Cross multiply
    21,619.21x = 29,845.79 × 15,346.57
  4. Step 4: Simplify right side
    21,619.21x = 458,030,505.44
  5. Step 5: Solve for x
    x = 458,030,505.44/21,619.21
  6. Step 6: Final answer
    x = 21,186.27

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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.