Home / 3,123.81-4,311.95-2,007.81

Finding the Fourth Proportional to 3,123.81, 4,311.95 and 2,007.81

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Solution

The fourth proportional to 3,123.81, 4,311.95 and 2,007.81 is: 2,771.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.81 : 4,311.95 = 2,007.81 : x
  2. Step 2: Convert to fraction form
    3,123.81/4,311.95 = 2,007.81/x
  3. Step 3: Cross multiply
    3,123.81x = 4,311.95 × 2,007.81
  4. Step 4: Simplify right side
    3,123.81x = 8,657,566.29
  5. Step 5: Solve for x
    x = 8,657,566.29/3,123.81
  6. Step 6: Final answer
    x = 2,771.48

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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.