Home / 3,139.49-4,330.94-1,812.39

Finding the Fourth Proportional to 3,139.49, 4,330.94 and 1,812.39

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Solution

The fourth proportional to 3,139.49, 4,330.94 and 1,812.39 is: 2,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.49 : 4,330.94 = 1,812.39 : x
  2. Step 2: Convert to fraction form
    3,139.49/4,330.94 = 1,812.39/x
  3. Step 3: Cross multiply
    3,139.49x = 4,330.94 × 1,812.39
  4. Step 4: Simplify right side
    3,139.49x = 7,849,343.28
  5. Step 5: Solve for x
    x = 7,849,343.28/3,139.49
  6. Step 6: Final answer
    x = 2,500.20

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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.