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Finding the Fourth Proportional to 8,453.72, 12,678.66 and 4,068.92

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Solution

The fourth proportional to 8,453.72, 12,678.66 and 4,068.92 is: 6,102.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,453.72 : 12,678.66 = 4,068.92 : x
  2. Step 2: Convert to fraction form
    8,453.72/12,678.66 = 4,068.92/x
  3. Step 3: Cross multiply
    8,453.72x = 12,678.66 × 4,068.92
  4. Step 4: Simplify right side
    8,453.72x = 51,588,453.25
  5. Step 5: Solve for x
    x = 51,588,453.25/8,453.72
  6. Step 6: Final answer
    x = 6,102.46

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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.