Home / 20,827.98-28,752.11-13,284.66

Finding the Fourth Proportional to 20,827.98, 28,752.11 and 13,284.66

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Solution

The fourth proportional to 20,827.98, 28,752.11 and 13,284.66 is: 18,338.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.98 : 28,752.11 = 13,284.66 : x
  2. Step 2: Convert to fraction form
    20,827.98/28,752.11 = 13,284.66/x
  3. Step 3: Cross multiply
    20,827.98x = 28,752.11 × 13,284.66
  4. Step 4: Simplify right side
    20,827.98x = 381,961,939.21
  5. Step 5: Solve for x
    x = 381,961,939.21/20,827.98
  6. Step 6: Final answer
    x = 18,338.89

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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.