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Finding the Fourth Proportional to 8,421.70, 11,609.79 and 5,895.97

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Solution

The fourth proportional to 8,421.70, 11,609.79 and 5,895.97 is: 8,127.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.70 : 11,609.79 = 5,895.97 : x
  2. Step 2: Convert to fraction form
    8,421.70/11,609.79 = 5,895.97/x
  3. Step 3: Cross multiply
    8,421.70x = 11,609.79 × 5,895.97
  4. Step 4: Simplify right side
    8,421.70x = 68,450,973.55
  5. Step 5: Solve for x
    x = 68,450,973.55/8,421.70
  6. Step 6: Final answer
    x = 8,127.93

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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.