Home / 15,453.28-21,325.42-8,379.72

Finding the Fourth Proportional to 15,453.28, 21,325.42 and 8,379.72

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Solution

The fourth proportional to 15,453.28, 21,325.42 and 8,379.72 is: 11,563.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,453.28 : 21,325.42 = 8,379.72 : x
  2. Step 2: Convert to fraction form
    15,453.28/21,325.42 = 8,379.72/x
  3. Step 3: Cross multiply
    15,453.28x = 21,325.42 × 8,379.72
  4. Step 4: Simplify right side
    15,453.28x = 178,701,048.48
  5. Step 5: Solve for x
    x = 178,701,048.48/15,453.28
  6. Step 6: Final answer
    x = 11,563.96

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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.