Home / 12,945.21-19,413.64-4,178.08

Finding the Fourth Proportional to 12,945.21, 19,413.64 and 4,178.08

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Solution

The fourth proportional to 12,945.21, 19,413.64 and 4,178.08 is: 6,265.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.21 : 19,413.64 = 4,178.08 : x
  2. Step 2: Convert to fraction form
    12,945.21/19,413.64 = 4,178.08/x
  3. Step 3: Cross multiply
    12,945.21x = 19,413.64 × 4,178.08
  4. Step 4: Simplify right side
    12,945.21x = 81,111,741.01
  5. Step 5: Solve for x
    x = 81,111,741.01/12,945.21
  6. Step 6: Final answer
    x = 6,265.77

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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.