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Finding the Fourth Proportional to 8,490.53, 12,678.59 and 6,933.57

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Solution

The fourth proportional to 8,490.53, 12,678.59 and 6,933.57 is: 10,353.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.53 : 12,678.59 = 6,933.57 : x
  2. Step 2: Convert to fraction form
    8,490.53/12,678.59 = 6,933.57/x
  3. Step 3: Cross multiply
    8,490.53x = 12,678.59 × 6,933.57
  4. Step 4: Simplify right side
    8,490.53x = 87,907,856.60
  5. Step 5: Solve for x
    x = 87,907,856.60/8,490.53
  6. Step 6: Final answer
    x = 10,353.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.