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Finding the Fourth Proportional to 7,123.35, 10,685.03 and 6,418.65

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Solution

The fourth proportional to 7,123.35, 10,685.03 and 6,418.65 is: 9,627.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.35 : 10,685.03 = 6,418.65 : x
  2. Step 2: Convert to fraction form
    7,123.35/10,685.03 = 6,418.65/x
  3. Step 3: Cross multiply
    7,123.35x = 10,685.03 × 6,418.65
  4. Step 4: Simplify right side
    7,123.35x = 68,583,435.72
  5. Step 5: Solve for x
    x = 68,583,435.72/7,123.35
  6. Step 6: Final answer
    x = 9,627.98

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Half scale
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Double scale
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Similar ratio
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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.