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Finding the Fourth Proportional to 3,959.90, 5,939.72 and 1,881.40

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Solution

The fourth proportional to 3,959.90, 5,939.72 and 1,881.40 is: 2,822.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.90 : 5,939.72 = 1,881.40 : x
  2. Step 2: Convert to fraction form
    3,959.90/5,939.72 = 1,881.40/x
  3. Step 3: Cross multiply
    3,959.90x = 5,939.72 × 1,881.40
  4. Step 4: Simplify right side
    3,959.90x = 11,174,959.51
  5. Step 5: Solve for x
    x = 11,174,959.51/3,959.90
  6. Step 6: Final answer
    x = 2,822.03

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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.