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Finding the Fourth Proportional to 35,857.91, 49,479.12 and 19,939.30

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Solution

The fourth proportional to 35,857.91, 49,479.12 and 19,939.30 is: 27,513.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,857.91 : 49,479.12 = 19,939.30 : x
  2. Step 2: Convert to fraction form
    35,857.91/49,479.12 = 19,939.30/x
  3. Step 3: Cross multiply
    35,857.91x = 49,479.12 × 19,939.30
  4. Step 4: Simplify right side
    35,857.91x = 986,578,893.72
  5. Step 5: Solve for x
    x = 986,578,893.72/35,857.91
  6. Step 6: Final answer
    x = 27,513.56

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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.