Home / 15,114.96-20,858.31-8,400.38

Finding the Fourth Proportional to 15,114.96, 20,858.31 and 8,400.38

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Solution

The fourth proportional to 15,114.96, 20,858.31 and 8,400.38 is: 11,592.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,114.96 : 20,858.31 = 8,400.38 : x
  2. Step 2: Convert to fraction form
    15,114.96/20,858.31 = 8,400.38/x
  3. Step 3: Cross multiply
    15,114.96x = 20,858.31 × 8,400.38
  4. Step 4: Simplify right side
    15,114.96x = 175,217,625.87
  5. Step 5: Solve for x
    x = 175,217,625.87/15,114.96
  6. Step 6: Final answer
    x = 11,592.33

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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.