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Finding the Fourth Proportional to 28,409.40, 42,614.09 and 8,687.96

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Solution

The fourth proportional to 28,409.40, 42,614.09 and 8,687.96 is: 13,031.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.40 : 42,614.09 = 8,687.96 : x
  2. Step 2: Convert to fraction form
    28,409.40/42,614.09 = 8,687.96/x
  3. Step 3: Cross multiply
    28,409.40x = 42,614.09 × 8,687.96
  4. Step 4: Simplify right side
    28,409.40x = 370,229,252.85
  5. Step 5: Solve for x
    x = 370,229,252.85/28,409.40
  6. Step 6: Final answer
    x = 13,031.93

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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.