Home / 38,781.50-58,172.25-12,488.90

Finding the Fourth Proportional to 38,781.50, 58,172.25 and 12,488.90

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Solution

The fourth proportional to 38,781.50, 58,172.25 and 12,488.90 is: 18,733.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,781.50 : 58,172.25 = 12,488.90 : x
  2. Step 2: Convert to fraction form
    38,781.50/58,172.25 = 12,488.90/x
  3. Step 3: Cross multiply
    38,781.50x = 58,172.25 × 12,488.90
  4. Step 4: Simplify right side
    38,781.50x = 726,507,413.03
  5. Step 5: Solve for x
    x = 726,507,413.03/38,781.50
  6. Step 6: Final answer
    x = 18,733.35

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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.