Home / 21,975.02-30,318-12,413.78

Finding the Fourth Proportional to 21,975.02, 30,318 and 12,413.78

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Solution

The fourth proportional to 21,975.02, 30,318 and 12,413.78 is: 17,126.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,975.02 : 30,318 = 12,413.78 : x
  2. Step 2: Convert to fraction form
    21,975.02/30,318 = 12,413.78/x
  3. Step 3: Cross multiply
    21,975.02x = 30,318 × 12,413.78
  4. Step 4: Simplify right side
    21,975.02x = 376,360,982.04
  5. Step 5: Solve for x
    x = 376,360,982.04/21,975.02
  6. Step 6: Final answer
    x = 17,126.76

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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.