Home / 21,622.58-29,840-12,190.94

Finding the Fourth Proportional to 21,622.58, 29,840 and 12,190.94

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Solution

The fourth proportional to 21,622.58, 29,840 and 12,190.94 is: 16,823.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.58 : 29,840 = 12,190.94 : x
  2. Step 2: Convert to fraction form
    21,622.58/29,840 = 12,190.94/x
  3. Step 3: Cross multiply
    21,622.58x = 29,840 × 12,190.94
  4. Step 4: Simplify right side
    21,622.58x = 363,777,649.60
  5. Step 5: Solve for x
    x = 363,777,649.60/21,622.58
  6. Step 6: Final answer
    x = 16,823.97

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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.