Home / 3,124.85-4,311.75-1,866.41

Finding the Fourth Proportional to 3,124.85, 4,311.75 and 1,866.41

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Solution

The fourth proportional to 3,124.85, 4,311.75 and 1,866.41 is: 2,575.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.85 : 4,311.75 = 1,866.41 : x
  2. Step 2: Convert to fraction form
    3,124.85/4,311.75 = 1,866.41/x
  3. Step 3: Cross multiply
    3,124.85x = 4,311.75 × 1,866.41
  4. Step 4: Simplify right side
    3,124.85x = 8,047,471.76
  5. Step 5: Solve for x
    x = 8,047,471.76/3,124.85
  6. Step 6: Final answer
    x = 2,575.32

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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.