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Finding the Fourth Proportional to 28,997.31, 40,028.54 and 19,578.63

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Solution

The fourth proportional to 28,997.31, 40,028.54 and 19,578.63 is: 27,026.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,997.31 : 40,028.54 = 19,578.63 : x
  2. Step 2: Convert to fraction form
    28,997.31/40,028.54 = 19,578.63/x
  3. Step 3: Cross multiply
    28,997.31x = 40,028.54 × 19,578.63
  4. Step 4: Simplify right side
    28,997.31x = 783,703,876.21
  5. Step 5: Solve for x
    x = 783,703,876.21/28,997.31
  6. Step 6: Final answer
    x = 27,026.78

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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.