Home / 12,291.80-18,413.40-8,355.20

Finding the Fourth Proportional to 12,291.80, 18,413.40 and 8,355.20

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Solution

The fourth proportional to 12,291.80, 18,413.40 and 8,355.20 is: 12,516.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,291.80 : 18,413.40 = 8,355.20 : x
  2. Step 2: Convert to fraction form
    12,291.80/18,413.40 = 8,355.20/x
  3. Step 3: Cross multiply
    12,291.80x = 18,413.40 × 8,355.20
  4. Step 4: Simplify right side
    12,291.80x = 153,847,639.68
  5. Step 5: Solve for x
    x = 153,847,639.68/12,291.80
  6. Step 6: Final answer
    x = 12,516.28

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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.