Home / 15,115.33-20,858.47-8,400.93

Finding the Fourth Proportional to 15,115.33, 20,858.47 and 8,400.93

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Solution

The fourth proportional to 15,115.33, 20,858.47 and 8,400.93 is: 11,592.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.33 : 20,858.47 = 8,400.93 : x
  2. Step 2: Convert to fraction form
    15,115.33/20,858.47 = 8,400.93/x
  3. Step 3: Cross multiply
    15,115.33x = 20,858.47 × 8,400.93
  4. Step 4: Simplify right side
    15,115.33x = 175,230,546.38
  5. Step 5: Solve for x
    x = 175,230,546.38/15,115.33
  6. Step 6: Final answer
    x = 11,592.90

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Half scale
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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.