Home / 28,413.09-39,208.28-15,665.63

Finding the Fourth Proportional to 28,413.09, 39,208.28 and 15,665.63

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Solution

The fourth proportional to 28,413.09, 39,208.28 and 15,665.63 is: 21,617.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,413.09 : 39,208.28 = 15,665.63 : x
  2. Step 2: Convert to fraction form
    28,413.09/39,208.28 = 15,665.63/x
  3. Step 3: Cross multiply
    28,413.09x = 39,208.28 × 15,665.63
  4. Step 4: Simplify right side
    28,413.09x = 614,222,133.05
  5. Step 5: Solve for x
    x = 614,222,133.05/28,413.09
  6. Step 6: Final answer
    x = 21,617.58

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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.