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Finding the Fourth Proportional to 7,170.99, 9,890.48 and 6,285.26

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Solution

The fourth proportional to 7,170.99, 9,890.48 and 6,285.26 is: 8,668.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,170.99 : 9,890.48 = 6,285.26 : x
  2. Step 2: Convert to fraction form
    7,170.99/9,890.48 = 6,285.26/x
  3. Step 3: Cross multiply
    7,170.99x = 9,890.48 × 6,285.26
  4. Step 4: Simplify right side
    7,170.99x = 62,164,157.45
  5. Step 5: Solve for x
    x = 62,164,157.45/7,170.99
  6. Step 6: Final answer
    x = 8,668.84

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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.