Home / 12,343.70-18,518.43-3,578.78

Finding the Fourth Proportional to 12,343.70, 18,518.43 and 3,578.78

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Solution

The fourth proportional to 12,343.70, 18,518.43 and 3,578.78 is: 5,369.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,343.70 : 18,518.43 = 3,578.78 : x
  2. Step 2: Convert to fraction form
    12,343.70/18,518.43 = 3,578.78/x
  3. Step 3: Cross multiply
    12,343.70x = 18,518.43 × 3,578.78
  4. Step 4: Simplify right side
    12,343.70x = 66,273,386.92
  5. Step 5: Solve for x
    x = 66,273,386.92/12,343.70
  6. Step 6: Final answer
    x = 5,369.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.