Home / 3,126.63-4,315.78-1,800.66

Finding the Fourth Proportional to 3,126.63, 4,315.78 and 1,800.66

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Solution

The fourth proportional to 3,126.63, 4,315.78 and 1,800.66 is: 2,485.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.63 : 4,315.78 = 1,800.66 : x
  2. Step 2: Convert to fraction form
    3,126.63/4,315.78 = 1,800.66/x
  3. Step 3: Cross multiply
    3,126.63x = 4,315.78 × 1,800.66
  4. Step 4: Simplify right side
    3,126.63x = 7,771,252.41
  5. Step 5: Solve for x
    x = 7,771,252.41/3,126.63
  6. Step 6: Final answer
    x = 2,485.50

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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.