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Finding the Fourth Proportional to 9,115.70, 13,679.95 and 3,925.30

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Solution

The fourth proportional to 9,115.70, 13,679.95 and 3,925.30 is: 5,890.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.70 : 13,679.95 = 3,925.30 : x
  2. Step 2: Convert to fraction form
    9,115.70/13,679.95 = 3,925.30/x
  3. Step 3: Cross multiply
    9,115.70x = 13,679.95 × 3,925.30
  4. Step 4: Simplify right side
    9,115.70x = 53,697,907.74
  5. Step 5: Solve for x
    x = 53,697,907.74/9,115.70
  6. Step 6: Final answer
    x = 5,890.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.