Home / 5,106.86-7,658.31-1,986.46

Finding the Fourth Proportional to 5,106.86, 7,658.31 and 1,986.46

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Solution

The fourth proportional to 5,106.86, 7,658.31 and 1,986.46 is: 2,978.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,106.86 : 7,658.31 = 1,986.46 : x
  2. Step 2: Convert to fraction form
    5,106.86/7,658.31 = 1,986.46/x
  3. Step 3: Cross multiply
    5,106.86x = 7,658.31 × 1,986.46
  4. Step 4: Simplify right side
    5,106.86x = 15,212,914.79
  5. Step 5: Solve for x
    x = 15,212,914.79/5,106.86
  6. Step 6: Final answer
    x = 2,978.91

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1.5x scale

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.