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Finding the Fourth Proportional to 8,628.12, 11,899.49 and 7,290.29

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Solution

The fourth proportional to 8,628.12, 11,899.49 and 7,290.29 is: 10,054.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.12 : 11,899.49 = 7,290.29 : x
  2. Step 2: Convert to fraction form
    8,628.12/11,899.49 = 7,290.29/x
  3. Step 3: Cross multiply
    8,628.12x = 11,899.49 × 7,290.29
  4. Step 4: Simplify right side
    8,628.12x = 86,750,726.25
  5. Step 5: Solve for x
    x = 86,750,726.25/8,628.12
  6. Step 6: Final answer
    x = 10,054.42

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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.