Home / 15,150.78-20,907.84-8,436.96

Finding the Fourth Proportional to 15,150.78, 20,907.84 and 8,436.96

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Solution

The fourth proportional to 15,150.78, 20,907.84 and 8,436.96 is: 11,642.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,150.78 : 20,907.84 = 8,436.96 : x
  2. Step 2: Convert to fraction form
    15,150.78/20,907.84 = 8,436.96/x
  3. Step 3: Cross multiply
    15,150.78x = 20,907.84 × 8,436.96
  4. Step 4: Simplify right side
    15,150.78x = 176,398,609.77
  5. Step 5: Solve for x
    x = 176,398,609.77/15,150.78
  6. Step 6: Final answer
    x = 11,642.87

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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.