Home / 3,921.51-5,413.32-2,802.90

Finding the Fourth Proportional to 3,921.51, 5,413.32 and 2,802.90

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Solution

The fourth proportional to 3,921.51, 5,413.32 and 2,802.90 is: 3,869.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.51 : 5,413.32 = 2,802.90 : x
  2. Step 2: Convert to fraction form
    3,921.51/5,413.32 = 2,802.90/x
  3. Step 3: Cross multiply
    3,921.51x = 5,413.32 × 2,802.90
  4. Step 4: Simplify right side
    3,921.51x = 15,172,994.63
  5. Step 5: Solve for x
    x = 15,172,994.63/3,921.51
  6. Step 6: Final answer
    x = 3,869.17

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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.