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Finding the Fourth Proportional to 8,455.70, 11,668.20 and 4,678.22

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Solution

The fourth proportional to 8,455.70, 11,668.20 and 4,678.22 is: 6,455.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.70 : 11,668.20 = 4,678.22 : x
  2. Step 2: Convert to fraction form
    8,455.70/11,668.20 = 4,678.22/x
  3. Step 3: Cross multiply
    8,455.70x = 11,668.20 × 4,678.22
  4. Step 4: Simplify right side
    8,455.70x = 54,586,406.60
  5. Step 5: Solve for x
    x = 54,586,406.60/8,455.70
  6. Step 6: Final answer
    x = 6,455.58

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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.