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Finding the Fourth Proportional to 20,576.80, 28,396 and 11,624.32

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Solution

The fourth proportional to 20,576.80, 28,396 and 11,624.32 is: 16,041.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.80 : 28,396 = 11,624.32 : x
  2. Step 2: Convert to fraction form
    20,576.80/28,396 = 11,624.32/x
  3. Step 3: Cross multiply
    20,576.80x = 28,396 × 11,624.32
  4. Step 4: Simplify right side
    20,576.80x = 330,084,190.72
  5. Step 5: Solve for x
    x = 330,084,190.72/20,576.80
  6. Step 6: Final answer
    x = 16,041.57

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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.