Home / 2,987.16-4,120.36-1,926.28

Finding the Fourth Proportional to 2,987.16, 4,120.36 and 1,926.28

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Solution

The fourth proportional to 2,987.16, 4,120.36 and 1,926.28 is: 2,657.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.16 : 4,120.36 = 1,926.28 : x
  2. Step 2: Convert to fraction form
    2,987.16/4,120.36 = 1,926.28/x
  3. Step 3: Cross multiply
    2,987.16x = 4,120.36 × 1,926.28
  4. Step 4: Simplify right side
    2,987.16x = 7,936,967.06
  5. Step 5: Solve for x
    x = 7,936,967.06/2,987.16
  6. Step 6: Final answer
    x = 2,657.03

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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.