Home / 7,781.51-11,665.71-3,619.40

Finding the Fourth Proportional to 7,781.51, 11,665.71 and 3,619.40

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Solution

The fourth proportional to 7,781.51, 11,665.71 and 3,619.40 is: 5,426.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.51 : 11,665.71 = 3,619.40 : x
  2. Step 2: Convert to fraction form
    7,781.51/11,665.71 = 3,619.40/x
  3. Step 3: Cross multiply
    7,781.51x = 11,665.71 × 3,619.40
  4. Step 4: Simplify right side
    7,781.51x = 42,222,812.45
  5. Step 5: Solve for x
    x = 42,222,812.45/7,781.51
  6. Step 6: Final answer
    x = 5,426.05

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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.