Home / 7,921.08-11,878.32-2,988

Finding the Fourth Proportional to 7,921.08, 11,878.32 and 2,988

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Solution

The fourth proportional to 7,921.08, 11,878.32 and 2,988 is: 4,480.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.08 : 11,878.32 = 2,988 : x
  2. Step 2: Convert to fraction form
    7,921.08/11,878.32 = 2,988/x
  3. Step 3: Cross multiply
    7,921.08x = 11,878.32 × 2,988
  4. Step 4: Simplify right side
    7,921.08x = 35,492,420.16
  5. Step 5: Solve for x
    x = 35,492,420.16/7,921.08
  6. Step 6: Final answer
    x = 4,480.76

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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.