Home / 18,429.84-25,413.48-12,131.28

Finding the Fourth Proportional to 18,429.84, 25,413.48 and 12,131.28

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Solution

The fourth proportional to 18,429.84, 25,413.48 and 12,131.28 is: 16,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.84 : 25,413.48 = 12,131.28 : x
  2. Step 2: Convert to fraction form
    18,429.84/25,413.48 = 12,131.28/x
  3. Step 3: Cross multiply
    18,429.84x = 25,413.48 × 12,131.28
  4. Step 4: Simplify right side
    18,429.84x = 308,298,041.65
  5. Step 5: Solve for x
    x = 308,298,041.65/18,429.84
  6. Step 6: Final answer
    x = 16,728.20

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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.