Home / 20,821.38-28,747.43-12,326.25

Finding the Fourth Proportional to 20,821.38, 28,747.43 and 12,326.25

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Solution

The fourth proportional to 20,821.38, 28,747.43 and 12,326.25 is: 17,018.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.38 : 28,747.43 = 12,326.25 : x
  2. Step 2: Convert to fraction form
    20,821.38/28,747.43 = 12,326.25/x
  3. Step 3: Cross multiply
    20,821.38x = 28,747.43 × 12,326.25
  4. Step 4: Simplify right side
    20,821.38x = 354,348,055.25
  5. Step 5: Solve for x
    x = 354,348,055.25/20,821.38
  6. Step 6: Final answer
    x = 17,018.47

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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.