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Finding the Fourth Proportional to 6,889.65, 9,509.45 and 3,907.26

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Solution

The fourth proportional to 6,889.65, 9,509.45 and 3,907.26 is: 5,393.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,889.65 : 9,509.45 = 3,907.26 : x
  2. Step 2: Convert to fraction form
    6,889.65/9,509.45 = 3,907.26/x
  3. Step 3: Cross multiply
    6,889.65x = 9,509.45 × 3,907.26
  4. Step 4: Simplify right side
    6,889.65x = 37,155,874.07
  5. Step 5: Solve for x
    x = 37,155,874.07/6,889.65
  6. Step 6: Final answer
    x = 5,393.00

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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.