Home / 3,138.36-4,331.51-1,812.18

Finding the Fourth Proportional to 3,138.36, 4,331.51 and 1,812.18

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Solution

The fourth proportional to 3,138.36, 4,331.51 and 1,812.18 is: 2,501.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.36 : 4,331.51 = 1,812.18 : x
  2. Step 2: Convert to fraction form
    3,138.36/4,331.51 = 1,812.18/x
  3. Step 3: Cross multiply
    3,138.36x = 4,331.51 × 1,812.18
  4. Step 4: Simplify right side
    3,138.36x = 7,849,475.79
  5. Step 5: Solve for x
    x = 7,849,475.79/3,138.36
  6. Step 6: Final answer
    x = 2,501.14

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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.