Home / 2,989.74-4,126.21-1,810.81

Finding the Fourth Proportional to 2,989.74, 4,126.21 and 1,810.81

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Solution

The fourth proportional to 2,989.74, 4,126.21 and 1,810.81 is: 2,499.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.74 : 4,126.21 = 1,810.81 : x
  2. Step 2: Convert to fraction form
    2,989.74/4,126.21 = 1,810.81/x
  3. Step 3: Cross multiply
    2,989.74x = 4,126.21 × 1,810.81
  4. Step 4: Simplify right side
    2,989.74x = 7,471,767.49
  5. Step 5: Solve for x
    x = 7,471,767.49/2,989.74
  6. Step 6: Final answer
    x = 2,499.14

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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.