Home / 20,523.23-28,321.53-11,570.65

Finding the Fourth Proportional to 20,523.23, 28,321.53 and 11,570.65

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Solution

The fourth proportional to 20,523.23, 28,321.53 and 11,570.65 is: 15,967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,523.23 : 28,321.53 = 11,570.65 : x
  2. Step 2: Convert to fraction form
    20,523.23/28,321.53 = 11,570.65/x
  3. Step 3: Cross multiply
    20,523.23x = 28,321.53 × 11,570.65
  4. Step 4: Simplify right side
    20,523.23x = 327,698,511.09
  5. Step 5: Solve for x
    x = 327,698,511.09/20,523.23
  6. Step 6: Final answer
    x = 15,967.20

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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.