Home / 6,686.40-10,030.80-2,791.20

Finding the Fourth Proportional to 6,686.40, 10,030.80 and 2,791.20

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Solution

The fourth proportional to 6,686.40, 10,030.80 and 2,791.20 is: 4,187.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,686.40 : 10,030.80 = 2,791.20 : x
  2. Step 2: Convert to fraction form
    6,686.40/10,030.80 = 2,791.20/x
  3. Step 3: Cross multiply
    6,686.40x = 10,030.80 × 2,791.20
  4. Step 4: Simplify right side
    6,686.40x = 27,997,968.96
  5. Step 5: Solve for x
    x = 27,997,968.96/6,686.40
  6. Step 6: Final answer
    x = 4,187.30

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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.