Home / 30,989.04-42,768.51-18,413.79

Finding the Fourth Proportional to 30,989.04, 42,768.51 and 18,413.79

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Solution

The fourth proportional to 30,989.04, 42,768.51 and 18,413.79 is: 25,413.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,989.04 : 42,768.51 = 18,413.79 : x
  2. Step 2: Convert to fraction form
    30,989.04/42,768.51 = 18,413.79/x
  3. Step 3: Cross multiply
    30,989.04x = 42,768.51 × 18,413.79
  4. Step 4: Simplify right side
    30,989.04x = 787,530,361.75
  5. Step 5: Solve for x
    x = 787,530,361.75/30,989.04
  6. Step 6: Final answer
    x = 25,413.19

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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.