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Finding the Fourth Proportional to 8,628.58, 11,900.10 and 7,290.73

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Solution

The fourth proportional to 8,628.58, 11,900.10 and 7,290.73 is: 10,055.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.58 : 11,900.10 = 7,290.73 : x
  2. Step 2: Convert to fraction form
    8,628.58/11,900.10 = 7,290.73/x
  3. Step 3: Cross multiply
    8,628.58x = 11,900.10 × 7,290.73
  4. Step 4: Simplify right side
    8,628.58x = 86,760,416.07
  5. Step 5: Solve for x
    x = 86,760,416.07/8,628.58
  6. Step 6: Final answer
    x = 10,055.01

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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.