Home / 20,120.22-30,186.51-9,603.66

Finding the Fourth Proportional to 20,120.22, 30,186.51 and 9,603.66

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Solution

The fourth proportional to 20,120.22, 30,186.51 and 9,603.66 is: 14,408.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.22 : 30,186.51 = 9,603.66 : x
  2. Step 2: Convert to fraction form
    20,120.22/30,186.51 = 9,603.66/x
  3. Step 3: Cross multiply
    20,120.22x = 30,186.51 × 9,603.66
  4. Step 4: Simplify right side
    20,120.22x = 289,900,978.63
  5. Step 5: Solve for x
    x = 289,900,978.63/20,120.22
  6. Step 6: Final answer
    x = 14,408.44

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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.