Home / 15,375.36-21,218.08-8,661.28

Finding the Fourth Proportional to 15,375.36, 21,218.08 and 8,661.28

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Solution

The fourth proportional to 15,375.36, 21,218.08 and 8,661.28 is: 11,952.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.36 : 21,218.08 = 8,661.28 : x
  2. Step 2: Convert to fraction form
    15,375.36/21,218.08 = 8,661.28/x
  3. Step 3: Cross multiply
    15,375.36x = 21,218.08 × 8,661.28
  4. Step 4: Simplify right side
    15,375.36x = 183,775,731.94
  5. Step 5: Solve for x
    x = 183,775,731.94/15,375.36
  6. Step 6: Final answer
    x = 11,952.61

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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.