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Finding the Fourth Proportional to 6,309.65, 8,703.15 and 3,947.69

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Solution

The fourth proportional to 6,309.65, 8,703.15 and 3,947.69 is: 5,445.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,309.65 : 8,703.15 = 3,947.69 : x
  2. Step 2: Convert to fraction form
    6,309.65/8,703.15 = 3,947.69/x
  3. Step 3: Cross multiply
    6,309.65x = 8,703.15 × 3,947.69
  4. Step 4: Simplify right side
    6,309.65x = 34,357,338.22
  5. Step 5: Solve for x
    x = 34,357,338.22/6,309.65
  6. Step 6: Final answer
    x = 5,445.21

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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.