Home / 20,801.56-28,706.10-12,418.12

Finding the Fourth Proportional to 20,801.56, 28,706.10 and 12,418.12

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Solution

The fourth proportional to 20,801.56, 28,706.10 and 12,418.12 is: 17,136.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.56 : 28,706.10 = 12,418.12 : x
  2. Step 2: Convert to fraction form
    20,801.56/28,706.10 = 12,418.12/x
  3. Step 3: Cross multiply
    20,801.56x = 28,706.10 × 12,418.12
  4. Step 4: Simplify right side
    20,801.56x = 356,475,794.53
  5. Step 5: Solve for x
    x = 356,475,794.53/20,801.56
  6. Step 6: Final answer
    x = 17,136.97

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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.