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Finding the Fourth Proportional to 7,165.28, 9,889.02 and 4,021.47

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Solution

The fourth proportional to 7,165.28, 9,889.02 and 4,021.47 is: 5,550.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,165.28 : 9,889.02 = 4,021.47 : x
  2. Step 2: Convert to fraction form
    7,165.28/9,889.02 = 4,021.47/x
  3. Step 3: Cross multiply
    7,165.28x = 9,889.02 × 4,021.47
  4. Step 4: Simplify right side
    7,165.28x = 39,768,397.26
  5. Step 5: Solve for x
    x = 39,768,397.26/7,165.28
  6. Step 6: Final answer
    x = 5,550.15

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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.