Home / 21,035.88-31,544.64-11,172.78

Finding the Fourth Proportional to 21,035.88, 31,544.64 and 11,172.78

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Solution

The fourth proportional to 21,035.88, 31,544.64 and 11,172.78 is: 16,754.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.88 : 31,544.64 = 11,172.78 : x
  2. Step 2: Convert to fraction form
    21,035.88/31,544.64 = 11,172.78/x
  3. Step 3: Cross multiply
    21,035.88x = 31,544.64 × 11,172.78
  4. Step 4: Simplify right side
    21,035.88x = 352,441,322.90
  5. Step 5: Solve for x
    x = 352,441,322.90/21,035.88
  6. Step 6: Final answer
    x = 16,754.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.