Home / 5,148.80-7,723.12-1,686

Finding the Fourth Proportional to 5,148.80, 7,723.12 and 1,686

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Solution

The fourth proportional to 5,148.80, 7,723.12 and 1,686 is: 2,528.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.80 : 7,723.12 = 1,686 : x
  2. Step 2: Convert to fraction form
    5,148.80/7,723.12 = 1,686/x
  3. Step 3: Cross multiply
    5,148.80x = 7,723.12 × 1,686
  4. Step 4: Simplify right side
    5,148.80x = 13,021,180.32
  5. Step 5: Solve for x
    x = 13,021,180.32/5,148.80
  6. Step 6: Final answer
    x = 2,528.97

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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.