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Finding the Fourth Proportional to 28,998, 40,021.29 and 16,422.75

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Solution

The fourth proportional to 28,998, 40,021.29 and 16,422.75 is: 22,665.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,998 : 40,021.29 = 16,422.75 : x
  2. Step 2: Convert to fraction form
    28,998/40,021.29 = 16,422.75/x
  3. Step 3: Cross multiply
    28,998x = 40,021.29 × 16,422.75
  4. Step 4: Simplify right side
    28,998x = 657,259,640.35
  5. Step 5: Solve for x
    x = 657,259,640.35/28,998
  6. Step 6: Final answer
    x = 22,665.69

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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.