Home / 21,367.21-29,484.62-12,415.09

Finding the Fourth Proportional to 21,367.21, 29,484.62 and 12,415.09

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Solution

The fourth proportional to 21,367.21, 29,484.62 and 12,415.09 is: 17,131.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,367.21 : 29,484.62 = 12,415.09 : x
  2. Step 2: Convert to fraction form
    21,367.21/29,484.62 = 12,415.09/x
  3. Step 3: Cross multiply
    21,367.21x = 29,484.62 × 12,415.09
  4. Step 4: Simplify right side
    21,367.21x = 366,054,001.42
  5. Step 5: Solve for x
    x = 366,054,001.42/21,367.21
  6. Step 6: Final answer
    x = 17,131.58

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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.