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Finding the Fourth Proportional to 7,668.70, 11,490.90 and 4,890.40

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Solution

The fourth proportional to 7,668.70, 11,490.90 and 4,890.40 is: 7,327.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,668.70 : 11,490.90 = 4,890.40 : x
  2. Step 2: Convert to fraction form
    7,668.70/11,490.90 = 4,890.40/x
  3. Step 3: Cross multiply
    7,668.70x = 11,490.90 × 4,890.40
  4. Step 4: Simplify right side
    7,668.70x = 56,195,097.36
  5. Step 5: Solve for x
    x = 56,195,097.36/7,668.70
  6. Step 6: Final answer
    x = 7,327.85

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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.