Home / 20,421.45-30,602.97-11,638.26

Finding the Fourth Proportional to 20,421.45, 30,602.97 and 11,638.26

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Solution

The fourth proportional to 20,421.45, 30,602.97 and 11,638.26 is: 17,440.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.45 : 30,602.97 = 11,638.26 : x
  2. Step 2: Convert to fraction form
    20,421.45/30,602.97 = 11,638.26/x
  3. Step 3: Cross multiply
    20,421.45x = 30,602.97 × 11,638.26
  4. Step 4: Simplify right side
    20,421.45x = 356,165,321.63
  5. Step 5: Solve for x
    x = 356,165,321.63/20,421.45
  6. Step 6: Final answer
    x = 17,440.75

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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.