Home / 3,012.81-4,157.91-1,686.57

Finding the Fourth Proportional to 3,012.81, 4,157.91 and 1,686.57

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Solution

The fourth proportional to 3,012.81, 4,157.91 and 1,686.57 is: 2,327.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.81 : 4,157.91 = 1,686.57 : x
  2. Step 2: Convert to fraction form
    3,012.81/4,157.91 = 1,686.57/x
  3. Step 3: Cross multiply
    3,012.81x = 4,157.91 × 1,686.57
  4. Step 4: Simplify right side
    3,012.81x = 7,012,606.27
  5. Step 5: Solve for x
    x = 7,012,606.27/3,012.81
  6. Step 6: Final answer
    x = 2,327.60

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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.