Home / 15,716.60-21,687.59-9,255.21

Finding the Fourth Proportional to 15,716.60, 21,687.59 and 9,255.21

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Solution

The fourth proportional to 15,716.60, 21,687.59 and 9,255.21 is: 12,771.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.60 : 21,687.59 = 9,255.21 : x
  2. Step 2: Convert to fraction form
    15,716.60/21,687.59 = 9,255.21/x
  3. Step 3: Cross multiply
    15,716.60x = 21,687.59 × 9,255.21
  4. Step 4: Simplify right side
    15,716.60x = 200,723,141.65
  5. Step 5: Solve for x
    x = 200,723,141.65/15,716.60
  6. Step 6: Final answer
    x = 12,771.41

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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.