Home / 20,736.90-28,606.52-13,170.89

Finding the Fourth Proportional to 20,736.90, 28,606.52 and 13,170.89

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Solution

The fourth proportional to 20,736.90, 28,606.52 and 13,170.89 is: 18,169.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.90 : 28,606.52 = 13,170.89 : x
  2. Step 2: Convert to fraction form
    20,736.90/28,606.52 = 13,170.89/x
  3. Step 3: Cross multiply
    20,736.90x = 28,606.52 × 13,170.89
  4. Step 4: Simplify right side
    20,736.90x = 376,773,432.65
  5. Step 5: Solve for x
    x = 376,773,432.65/20,736.90
  6. Step 6: Final answer
    x = 18,169.23

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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.