Home / 3,129.12-4,314.96-2,688.48

Finding the Fourth Proportional to 3,129.12, 4,314.96 and 2,688.48

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Solution

The fourth proportional to 3,129.12, 4,314.96 and 2,688.48 is: 3,707.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.12 : 4,314.96 = 2,688.48 : x
  2. Step 2: Convert to fraction form
    3,129.12/4,314.96 = 2,688.48/x
  3. Step 3: Cross multiply
    3,129.12x = 4,314.96 × 2,688.48
  4. Step 4: Simplify right side
    3,129.12x = 11,600,683.66
  5. Step 5: Solve for x
    x = 11,600,683.66/3,129.12
  6. Step 6: Final answer
    x = 3,707.33

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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.