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Finding the Fourth Proportional to 6,891.51, 9,510.39 and 3,907.11

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Solution

The fourth proportional to 6,891.51, 9,510.39 and 3,907.11 is: 5,391.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.51 : 9,510.39 = 3,907.11 : x
  2. Step 2: Convert to fraction form
    6,891.51/9,510.39 = 3,907.11/x
  3. Step 3: Cross multiply
    6,891.51x = 9,510.39 × 3,907.11
  4. Step 4: Simplify right side
    6,891.51x = 37,158,139.87
  5. Step 5: Solve for x
    x = 37,158,139.87/6,891.51
  6. Step 6: Final answer
    x = 5,391.87

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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.