Home / 20,728.32-28,605.18-11,776.31

Finding the Fourth Proportional to 20,728.32, 28,605.18 and 11,776.31

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Solution

The fourth proportional to 20,728.32, 28,605.18 and 11,776.31 is: 16,251.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.32 : 28,605.18 = 11,776.31 : x
  2. Step 2: Convert to fraction form
    20,728.32/28,605.18 = 11,776.31/x
  3. Step 3: Cross multiply
    20,728.32x = 28,605.18 × 11,776.31
  4. Step 4: Simplify right side
    20,728.32x = 336,863,559.31
  5. Step 5: Solve for x
    x = 336,863,559.31/20,728.32
  6. Step 6: Final answer
    x = 16,251.37

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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.