Home / 6,918.64-10,376.84-1,987.16

Finding the Fourth Proportional to 6,918.64, 10,376.84 and 1,987.16

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Solution

The fourth proportional to 6,918.64, 10,376.84 and 1,987.16 is: 2,980.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.64 : 10,376.84 = 1,987.16 : x
  2. Step 2: Convert to fraction form
    6,918.64/10,376.84 = 1,987.16/x
  3. Step 3: Cross multiply
    6,918.64x = 10,376.84 × 1,987.16
  4. Step 4: Simplify right side
    6,918.64x = 20,620,394.46
  5. Step 5: Solve for x
    x = 20,620,394.46/6,918.64
  6. Step 6: Final answer
    x = 2,980.41

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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.