Home / 30,745.12-42,413.52-20,130.08

Finding the Fourth Proportional to 30,745.12, 42,413.52 and 20,130.08

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Solution

The fourth proportional to 30,745.12, 42,413.52 and 20,130.08 is: 27,769.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,745.12 : 42,413.52 = 20,130.08 : x
  2. Step 2: Convert to fraction form
    30,745.12/42,413.52 = 20,130.08/x
  3. Step 3: Cross multiply
    30,745.12x = 42,413.52 × 20,130.08
  4. Step 4: Simplify right side
    30,745.12x = 853,787,550.68
  5. Step 5: Solve for x
    x = 853,787,550.68/30,745.12
  6. Step 6: Final answer
    x = 27,769.86

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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.