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Finding the Fourth Proportional to 3,689.51, 5,126.47 and 3,650.99

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Solution

The fourth proportional to 3,689.51, 5,126.47 and 3,650.99 is: 5,072.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.51 : 5,126.47 = 3,650.99 : x
  2. Step 2: Convert to fraction form
    3,689.51/5,126.47 = 3,650.99/x
  3. Step 3: Cross multiply
    3,689.51x = 5,126.47 × 3,650.99
  4. Step 4: Simplify right side
    3,689.51x = 18,716,672.45
  5. Step 5: Solve for x
    x = 18,716,672.45/3,689.51
  6. Step 6: Final answer
    x = 5,072.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.