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Finding the Fourth Proportional to 7,103.95, 9,801.85 and 4,078.89

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Solution

The fourth proportional to 7,103.95, 9,801.85 and 4,078.89 is: 5,627.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,103.95 : 9,801.85 = 4,078.89 : x
  2. Step 2: Convert to fraction form
    7,103.95/9,801.85 = 4,078.89/x
  3. Step 3: Cross multiply
    7,103.95x = 9,801.85 × 4,078.89
  4. Step 4: Simplify right side
    7,103.95x = 39,980,667.95
  5. Step 5: Solve for x
    x = 39,980,667.95/7,103.95
  6. Step 6: Final answer
    x = 5,627.95

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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.