Home / 20,502.98-28,310.87-12,961.47

Finding the Fourth Proportional to 20,502.98, 28,310.87 and 12,961.47

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Solution

The fourth proportional to 20,502.98, 28,310.87 and 12,961.47 is: 17,897.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502.98 : 28,310.87 = 12,961.47 : x
  2. Step 2: Convert to fraction form
    20,502.98/28,310.87 = 12,961.47/x
  3. Step 3: Cross multiply
    20,502.98x = 28,310.87 × 12,961.47
  4. Step 4: Simplify right side
    20,502.98x = 366,950,524.58
  5. Step 5: Solve for x
    x = 366,950,524.58/20,502.98
  6. Step 6: Final answer
    x = 17,897.43

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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.