Home / 21,028.89-29,018.66-12,540.63

Finding the Fourth Proportional to 21,028.89, 29,018.66 and 12,540.63

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Solution

The fourth proportional to 21,028.89, 29,018.66 and 12,540.63 is: 17,305.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,028.89 : 29,018.66 = 12,540.63 : x
  2. Step 2: Convert to fraction form
    21,028.89/29,018.66 = 12,540.63/x
  3. Step 3: Cross multiply
    21,028.89x = 29,018.66 × 12,540.63
  4. Step 4: Simplify right side
    21,028.89x = 363,912,215.45
  5. Step 5: Solve for x
    x = 363,912,215.45/21,028.89
  6. Step 6: Final answer
    x = 17,305.35

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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.