Home / 20,743.18-28,624.62-12,786.16

Finding the Fourth Proportional to 20,743.18, 28,624.62 and 12,786.16

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Solution

The fourth proportional to 20,743.18, 28,624.62 and 12,786.16 is: 17,644.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.18 : 28,624.62 = 12,786.16 : x
  2. Step 2: Convert to fraction form
    20,743.18/28,624.62 = 12,786.16/x
  3. Step 3: Cross multiply
    20,743.18x = 28,624.62 × 12,786.16
  4. Step 4: Simplify right side
    20,743.18x = 365,998,971.26
  5. Step 5: Solve for x
    x = 365,998,971.26/20,743.18
  6. Step 6: Final answer
    x = 17,644.30

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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.