Home / 4,685.89-7,021.87-1,909.16

Finding the Fourth Proportional to 4,685.89, 7,021.87 and 1,909.16

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Solution

The fourth proportional to 4,685.89, 7,021.87 and 1,909.16 is: 2,860.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,685.89 : 7,021.87 = 1,909.16 : x
  2. Step 2: Convert to fraction form
    4,685.89/7,021.87 = 1,909.16/x
  3. Step 3: Cross multiply
    4,685.89x = 7,021.87 × 1,909.16
  4. Step 4: Simplify right side
    4,685.89x = 13,405,863.78
  5. Step 5: Solve for x
    x = 13,405,863.78/4,685.89
  6. Step 6: Final answer
    x = 2,860.90

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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.