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Finding the Fourth Proportional to 6,638.95, 9,160.09 and 4,278.25

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Solution

The fourth proportional to 6,638.95, 9,160.09 and 4,278.25 is: 5,902.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.95 : 9,160.09 = 4,278.25 : x
  2. Step 2: Convert to fraction form
    6,638.95/9,160.09 = 4,278.25/x
  3. Step 3: Cross multiply
    6,638.95x = 9,160.09 × 4,278.25
  4. Step 4: Simplify right side
    6,638.95x = 39,189,155.04
  5. Step 5: Solve for x
    x = 39,189,155.04/6,638.95
  6. Step 6: Final answer
    x = 5,902.91

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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.