Home / 13,221.63-18,222.44-10,422.27

Finding the Fourth Proportional to 13,221.63, 18,222.44 and 10,422.27

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Solution

The fourth proportional to 13,221.63, 18,222.44 and 10,422.27 is: 14,364.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.63 : 18,222.44 = 10,422.27 : x
  2. Step 2: Convert to fraction form
    13,221.63/18,222.44 = 10,422.27/x
  3. Step 3: Cross multiply
    13,221.63x = 18,222.44 × 10,422.27
  4. Step 4: Simplify right side
    13,221.63x = 189,919,137.63
  5. Step 5: Solve for x
    x = 189,919,137.63/13,221.63
  6. Step 6: Final answer
    x = 14,364.28

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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.