Home / 3,891.72-5,370.48-2,123.28

Finding the Fourth Proportional to 3,891.72, 5,370.48 and 2,123.28

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Solution

The fourth proportional to 3,891.72, 5,370.48 and 2,123.28 is: 2,930.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.72 : 5,370.48 = 2,123.28 : x
  2. Step 2: Convert to fraction form
    3,891.72/5,370.48 = 2,123.28/x
  3. Step 3: Cross multiply
    3,891.72x = 5,370.48 × 2,123.28
  4. Step 4: Simplify right side
    3,891.72x = 11,403,032.77
  5. Step 5: Solve for x
    x = 11,403,032.77/3,891.72
  6. Step 6: Final answer
    x = 2,930.08

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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.