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Finding the Fourth Proportional to 8,900.51, 12,290.87 and 7,144.97

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Solution

The fourth proportional to 8,900.51, 12,290.87 and 7,144.97 is: 9,866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,900.51 : 12,290.87 = 7,144.97 : x
  2. Step 2: Convert to fraction form
    8,900.51/12,290.87 = 7,144.97/x
  3. Step 3: Cross multiply
    8,900.51x = 12,290.87 × 7,144.97
  4. Step 4: Simplify right side
    8,900.51x = 87,817,892.43
  5. Step 5: Solve for x
    x = 87,817,892.43/8,900.51
  6. Step 6: Final answer
    x = 9,866.61

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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.