Home / 15,336.57-21,164.71-8,438.03

Finding the Fourth Proportional to 15,336.57, 21,164.71 and 8,438.03

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Solution

The fourth proportional to 15,336.57, 21,164.71 and 8,438.03 is: 11,644.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,336.57 : 21,164.71 = 8,438.03 : x
  2. Step 2: Convert to fraction form
    15,336.57/21,164.71 = 8,438.03/x
  3. Step 3: Cross multiply
    15,336.57x = 21,164.71 × 8,438.03
  4. Step 4: Simplify right side
    15,336.57x = 178,588,366.67
  5. Step 5: Solve for x
    x = 178,588,366.67/15,336.57
  6. Step 6: Final answer
    x = 11,644.61

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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.