Home / 15,433.69-21,299.41-8,720.36

Finding the Fourth Proportional to 15,433.69, 21,299.41 and 8,720.36

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Solution

The fourth proportional to 15,433.69, 21,299.41 and 8,720.36 is: 12,034.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,433.69 : 21,299.41 = 8,720.36 : x
  2. Step 2: Convert to fraction form
    15,433.69/21,299.41 = 8,720.36/x
  3. Step 3: Cross multiply
    15,433.69x = 21,299.41 × 8,720.36
  4. Step 4: Simplify right side
    15,433.69x = 185,738,458.21
  5. Step 5: Solve for x
    x = 185,738,458.21/15,433.69
  6. Step 6: Final answer
    x = 12,034.61

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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.