Home / 21,028.37-29,018.94-12,078.68

Finding the Fourth Proportional to 21,028.37, 29,018.94 and 12,078.68

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Solution

The fourth proportional to 21,028.37, 29,018.94 and 12,078.68 is: 16,668.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,028.37 : 29,018.94 = 12,078.68 : x
  2. Step 2: Convert to fraction form
    21,028.37/29,018.94 = 12,078.68/x
  3. Step 3: Cross multiply
    21,028.37x = 29,018.94 × 12,078.68
  4. Step 4: Simplify right side
    21,028.37x = 350,510,490.20
  5. Step 5: Solve for x
    x = 350,510,490.20/21,028.37
  6. Step 6: Final answer
    x = 16,668.46

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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.