Home / 4,811.60-7,215.90-1,890.80

Finding the Fourth Proportional to 4,811.60, 7,215.90 and 1,890.80

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Solution

The fourth proportional to 4,811.60, 7,215.90 and 1,890.80 is: 2,835.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,811.60 : 7,215.90 = 1,890.80 : x
  2. Step 2: Convert to fraction form
    4,811.60/7,215.90 = 1,890.80/x
  3. Step 3: Cross multiply
    4,811.60x = 7,215.90 × 1,890.80
  4. Step 4: Simplify right side
    4,811.60x = 13,643,823.72
  5. Step 5: Solve for x
    x = 13,643,823.72/4,811.60
  6. Step 6: Final answer
    x = 2,835.61

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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.