Home / 2,987.36-4,123.44-1,867.64

Finding the Fourth Proportional to 2,987.36, 4,123.44 and 1,867.64

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Solution

The fourth proportional to 2,987.36, 4,123.44 and 1,867.64 is: 2,577.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.36 : 4,123.44 = 1,867.64 : x
  2. Step 2: Convert to fraction form
    2,987.36/4,123.44 = 1,867.64/x
  3. Step 3: Cross multiply
    2,987.36x = 4,123.44 × 1,867.64
  4. Step 4: Simplify right side
    2,987.36x = 7,701,080.86
  5. Step 5: Solve for x
    x = 7,701,080.86/2,987.36
  6. Step 6: Final answer
    x = 2,577.89

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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.