Home / 20,391.69-28,140.39-12,433.44

Finding the Fourth Proportional to 20,391.69, 28,140.39 and 12,433.44

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Solution

The fourth proportional to 20,391.69, 28,140.39 and 12,433.44 is: 17,158.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.69 : 28,140.39 = 12,433.44 : x
  2. Step 2: Convert to fraction form
    20,391.69/28,140.39 = 12,433.44/x
  3. Step 3: Cross multiply
    20,391.69x = 28,140.39 × 12,433.44
  4. Step 4: Simplify right side
    20,391.69x = 349,881,850.64
  5. Step 5: Solve for x
    x = 349,881,850.64/20,391.69
  6. Step 6: Final answer
    x = 17,158.06

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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.