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Finding the Fourth Proportional to 38,349, 57,486.78 and 19,621.80

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Solution

The fourth proportional to 38,349, 57,486.78 and 19,621.80 is: 29,413.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,349 : 57,486.78 = 19,621.80 : x
  2. Step 2: Convert to fraction form
    38,349/57,486.78 = 19,621.80/x
  3. Step 3: Cross multiply
    38,349x = 57,486.78 × 19,621.80
  4. Step 4: Simplify right side
    38,349x = 1,127,994,099.80
  5. Step 5: Solve for x
    x = 1,127,994,099.80/38,349
  6. Step 6: Final answer
    x = 29,413.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.