Home / 3,138.81-4,331.54-1,812.63

Finding the Fourth Proportional to 3,138.81, 4,331.54 and 1,812.63

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Solution

The fourth proportional to 3,138.81, 4,331.54 and 1,812.63 is: 2,501.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.81 : 4,331.54 = 1,812.63 : x
  2. Step 2: Convert to fraction form
    3,138.81/4,331.54 = 1,812.63/x
  3. Step 3: Cross multiply
    3,138.81x = 4,331.54 × 1,812.63
  4. Step 4: Simplify right side
    3,138.81x = 7,851,479.35
  5. Step 5: Solve for x
    x = 7,851,479.35/3,138.81
  6. Step 6: Final answer
    x = 2,501.42

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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.