Home / 15,321.23-21,142.73-8,515.68

Finding the Fourth Proportional to 15,321.23, 21,142.73 and 8,515.68

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Solution

The fourth proportional to 15,321.23, 21,142.73 and 8,515.68 is: 11,751.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.23 : 21,142.73 = 8,515.68 : x
  2. Step 2: Convert to fraction form
    15,321.23/21,142.73 = 8,515.68/x
  3. Step 3: Cross multiply
    15,321.23x = 21,142.73 × 8,515.68
  4. Step 4: Simplify right side
    15,321.23x = 180,044,723.01
  5. Step 5: Solve for x
    x = 180,044,723.01/15,321.23
  6. Step 6: Final answer
    x = 11,751.32

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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.