Home / 21,857.55-30,163.37-12,297.45

Finding the Fourth Proportional to 21,857.55, 30,163.37 and 12,297.45

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Solution

The fourth proportional to 21,857.55, 30,163.37 and 12,297.45 is: 16,970.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.55 : 30,163.37 = 12,297.45 : x
  2. Step 2: Convert to fraction form
    21,857.55/30,163.37 = 12,297.45/x
  3. Step 3: Cross multiply
    21,857.55x = 30,163.37 × 12,297.45
  4. Step 4: Simplify right side
    21,857.55x = 370,932,383.59
  5. Step 5: Solve for x
    x = 370,932,383.59/21,857.55
  6. Step 6: Final answer
    x = 16,970.45

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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.