Home / 3,420.12-4,718.70-1,927.80

Finding the Fourth Proportional to 3,420.12, 4,718.70 and 1,927.80

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Solution

The fourth proportional to 3,420.12, 4,718.70 and 1,927.80 is: 2,659.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.12 : 4,718.70 = 1,927.80 : x
  2. Step 2: Convert to fraction form
    3,420.12/4,718.70 = 1,927.80/x
  3. Step 3: Cross multiply
    3,420.12x = 4,718.70 × 1,927.80
  4. Step 4: Simplify right side
    3,420.12x = 9,096,709.86
  5. Step 5: Solve for x
    x = 9,096,709.86/3,420.12
  6. Step 6: Final answer
    x = 2,659.76

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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.