Home / 28,174.78-38,880.86-15,427.82

Finding the Fourth Proportional to 28,174.78, 38,880.86 and 15,427.82

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Solution

The fourth proportional to 28,174.78, 38,880.86 and 15,427.82 is: 21,290.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,174.78 : 38,880.86 = 15,427.82 : x
  2. Step 2: Convert to fraction form
    28,174.78/38,880.86 = 15,427.82/x
  3. Step 3: Cross multiply
    28,174.78x = 38,880.86 × 15,427.82
  4. Step 4: Simplify right side
    28,174.78x = 599,846,909.53
  5. Step 5: Solve for x
    x = 599,846,909.53/28,174.78
  6. Step 6: Final answer
    x = 21,290.21

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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.