Home / 15,201.42-20,975.40-8,486.79

Finding the Fourth Proportional to 15,201.42, 20,975.40 and 8,486.79

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Solution

The fourth proportional to 15,201.42, 20,975.40 and 8,486.79 is: 11,710.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,201.42 : 20,975.40 = 8,486.79 : x
  2. Step 2: Convert to fraction form
    15,201.42/20,975.40 = 8,486.79/x
  3. Step 3: Cross multiply
    15,201.42x = 20,975.40 × 8,486.79
  4. Step 4: Simplify right side
    15,201.42x = 178,013,814.97
  5. Step 5: Solve for x
    x = 178,013,814.97/15,201.42
  6. Step 6: Final answer
    x = 11,710.34

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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.