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Finding the Fourth Proportional to 3,907, 5,391.68 and 2,913.16

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Solution

The fourth proportional to 3,907, 5,391.68 and 2,913.16 is: 4,020.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907 : 5,391.68 = 2,913.16 : x
  2. Step 2: Convert to fraction form
    3,907/5,391.68 = 2,913.16/x
  3. Step 3: Cross multiply
    3,907x = 5,391.68 × 2,913.16
  4. Step 4: Simplify right side
    3,907x = 15,706,826.51
  5. Step 5: Solve for x
    x = 15,706,826.51/3,907
  6. Step 6: Final answer
    x = 4,020.18

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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.