Home / 3,112.81-4,295.67-1,715.56

Finding the Fourth Proportional to 3,112.81, 4,295.67 and 1,715.56

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Solution

The fourth proportional to 3,112.81, 4,295.67 and 1,715.56 is: 2,367.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.81 : 4,295.67 = 1,715.56 : x
  2. Step 2: Convert to fraction form
    3,112.81/4,295.67 = 1,715.56/x
  3. Step 3: Cross multiply
    3,112.81x = 4,295.67 × 1,715.56
  4. Step 4: Simplify right side
    3,112.81x = 7,369,479.63
  5. Step 5: Solve for x
    x = 7,369,479.63/3,112.81
  6. Step 6: Final answer
    x = 2,367.47

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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.