Home / 21,415.39-29,552.27-11,855.64

Finding the Fourth Proportional to 21,415.39, 29,552.27 and 11,855.64

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Solution

The fourth proportional to 21,415.39, 29,552.27 and 11,855.64 is: 16,360.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.39 : 29,552.27 = 11,855.64 : x
  2. Step 2: Convert to fraction form
    21,415.39/29,552.27 = 11,855.64/x
  3. Step 3: Cross multiply
    21,415.39x = 29,552.27 × 11,855.64
  4. Step 4: Simplify right side
    21,415.39x = 350,361,074.30
  5. Step 5: Solve for x
    x = 350,361,074.30/21,415.39
  6. Step 6: Final answer
    x = 16,360.25

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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.