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Finding the Fourth Proportional to 7,166.67, 9,890.08 and 3,980.03

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Solution

The fourth proportional to 7,166.67, 9,890.08 and 3,980.03 is: 5,492.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,166.67 : 9,890.08 = 3,980.03 : x
  2. Step 2: Convert to fraction form
    7,166.67/9,890.08 = 3,980.03/x
  3. Step 3: Cross multiply
    7,166.67x = 9,890.08 × 3,980.03
  4. Step 4: Simplify right side
    7,166.67x = 39,362,829.88
  5. Step 5: Solve for x
    x = 39,362,829.88/7,166.67
  6. Step 6: Final answer
    x = 5,492.49

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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.