Home / 21,814.80-30,103.62-13,331.12

Finding the Fourth Proportional to 21,814.80, 30,103.62 and 13,331.12

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Solution

The fourth proportional to 21,814.80, 30,103.62 and 13,331.12 is: 18,396.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.80 : 30,103.62 = 13,331.12 : x
  2. Step 2: Convert to fraction form
    21,814.80/30,103.62 = 13,331.12/x
  3. Step 3: Cross multiply
    21,814.80x = 30,103.62 × 13,331.12
  4. Step 4: Simplify right side
    21,814.80x = 401,314,770.14
  5. Step 5: Solve for x
    x = 401,314,770.14/21,814.80
  6. Step 6: Final answer
    x = 18,396.45

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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.