Home / 20,393.69-28,143.15-12,435.44

Finding the Fourth Proportional to 20,393.69, 28,143.15 and 12,435.44

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Solution

The fourth proportional to 20,393.69, 28,143.15 and 12,435.44 is: 17,160.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.69 : 28,143.15 = 12,435.44 : x
  2. Step 2: Convert to fraction form
    20,393.69/28,143.15 = 12,435.44/x
  3. Step 3: Cross multiply
    20,393.69x = 28,143.15 × 12,435.44
  4. Step 4: Simplify right side
    20,393.69x = 349,972,453.24
  5. Step 5: Solve for x
    x = 349,972,453.24/20,393.69
  6. Step 6: Final answer
    x = 17,160.82

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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.