Home / 3,107.86-4,289.34-1,913.56

Finding the Fourth Proportional to 3,107.86, 4,289.34 and 1,913.56

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Solution

The fourth proportional to 3,107.86, 4,289.34 and 1,913.56 is: 2,641.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.86 : 4,289.34 = 1,913.56 : x
  2. Step 2: Convert to fraction form
    3,107.86/4,289.34 = 1,913.56/x
  3. Step 3: Cross multiply
    3,107.86x = 4,289.34 × 1,913.56
  4. Step 4: Simplify right side
    3,107.86x = 8,207,909.45
  5. Step 5: Solve for x
    x = 8,207,909.45/3,107.86
  6. Step 6: Final answer
    x = 2,641.02

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1.5x scale

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.