Home / 21,419.10-29,558.37-11,987.64

Finding the Fourth Proportional to 21,419.10, 29,558.37 and 11,987.64

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Solution

The fourth proportional to 21,419.10, 29,558.37 and 11,987.64 is: 16,542.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.10 : 29,558.37 = 11,987.64 : x
  2. Step 2: Convert to fraction form
    21,419.10/29,558.37 = 11,987.64/x
  3. Step 3: Cross multiply
    21,419.10x = 29,558.37 × 11,987.64
  4. Step 4: Simplify right side
    21,419.10x = 354,335,098.55
  5. Step 5: Solve for x
    x = 354,335,098.55/21,419.10
  6. Step 6: Final answer
    x = 16,542.95

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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.