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Finding the Fourth Proportional to 8,438.91, 12,631.80 and 5,790.93

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Solution

The fourth proportional to 8,438.91, 12,631.80 and 5,790.93 is: 8,668.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.91 : 12,631.80 = 5,790.93 : x
  2. Step 2: Convert to fraction form
    8,438.91/12,631.80 = 5,790.93/x
  3. Step 3: Cross multiply
    8,438.91x = 12,631.80 × 5,790.93
  4. Step 4: Simplify right side
    8,438.91x = 73,149,869.57
  5. Step 5: Solve for x
    x = 73,149,869.57/8,438.91
  6. Step 6: Final answer
    x = 8,668.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.