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Finding the Fourth Proportional to 28,993.48, 39,994.15 and 16,415.80

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Solution

The fourth proportional to 28,993.48, 39,994.15 and 16,415.80 is: 22,644.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,993.48 : 39,994.15 = 16,415.80 : x
  2. Step 2: Convert to fraction form
    28,993.48/39,994.15 = 16,415.80/x
  3. Step 3: Cross multiply
    28,993.48x = 39,994.15 × 16,415.80
  4. Step 4: Simplify right side
    28,993.48x = 656,535,685.52
  5. Step 5: Solve for x
    x = 656,535,685.52/28,993.48
  6. Step 6: Final answer
    x = 22,644.26

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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.