Home / 15,453.36-21,325.68-8,379.80

Finding the Fourth Proportional to 15,453.36, 21,325.68 and 8,379.80

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Solution

The fourth proportional to 15,453.36, 21,325.68 and 8,379.80 is: 11,564.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,453.36 : 21,325.68 = 8,379.80 : x
  2. Step 2: Convert to fraction form
    15,453.36/21,325.68 = 8,379.80/x
  3. Step 3: Cross multiply
    15,453.36x = 21,325.68 × 8,379.80
  4. Step 4: Simplify right side
    15,453.36x = 178,704,933.26
  5. Step 5: Solve for x
    x = 178,704,933.26/15,453.36
  6. Step 6: Final answer
    x = 11,564.15

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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.