Home / 7,274.61-10,916.69-3,990

Finding the Fourth Proportional to 7,274.61, 10,916.69 and 3,990

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Solution

The fourth proportional to 7,274.61, 10,916.69 and 3,990 is: 5,987.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,274.61 : 10,916.69 = 3,990 : x
  2. Step 2: Convert to fraction form
    7,274.61/10,916.69 = 3,990/x
  3. Step 3: Cross multiply
    7,274.61x = 10,916.69 × 3,990
  4. Step 4: Simplify right side
    7,274.61x = 43,557,593.10
  5. Step 5: Solve for x
    x = 43,557,593.10/7,274.61
  6. Step 6: Final answer
    x = 5,987.62

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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.