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Finding the Fourth Proportional to 10,919.55, 15,069 and 6,203.85

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Solution

The fourth proportional to 10,919.55, 15,069 and 6,203.85 is: 8,561.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.55 : 15,069 = 6,203.85 : x
  2. Step 2: Convert to fraction form
    10,919.55/15,069 = 6,203.85/x
  3. Step 3: Cross multiply
    10,919.55x = 15,069 × 6,203.85
  4. Step 4: Simplify right side
    10,919.55x = 93,485,815.65
  5. Step 5: Solve for x
    x = 93,485,815.65/10,919.55
  6. Step 6: Final answer
    x = 8,561.32

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Half scale
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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.