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Finding the Fourth Proportional to 7,165.68, 9,890.04 and 4,021.68

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Solution

The fourth proportional to 7,165.68, 9,890.04 and 4,021.68 is: 5,550.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,165.68 : 9,890.04 = 4,021.68 : x
  2. Step 2: Convert to fraction form
    7,165.68/9,890.04 = 4,021.68/x
  3. Step 3: Cross multiply
    7,165.68x = 9,890.04 × 4,021.68
  4. Step 4: Simplify right side
    7,165.68x = 39,774,576.07
  5. Step 5: Solve for x
    x = 39,774,576.07/7,165.68
  6. Step 6: Final answer
    x = 5,550.71

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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.