Home / 20,728.49-28,605.38-11,297.05

Finding the Fourth Proportional to 20,728.49, 28,605.38 and 11,297.05

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Solution

The fourth proportional to 20,728.49, 28,605.38 and 11,297.05 is: 15,589.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.49 : 28,605.38 = 11,297.05 : x
  2. Step 2: Convert to fraction form
    20,728.49/28,605.38 = 11,297.05/x
  3. Step 3: Cross multiply
    20,728.49x = 28,605.38 × 11,297.05
  4. Step 4: Simplify right side
    20,728.49x = 323,156,280.13
  5. Step 5: Solve for x
    x = 323,156,280.13/20,728.49
  6. Step 6: Final answer
    x = 15,589.96

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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.