Home / 15,273.85-21,078.74-8,561.64

Finding the Fourth Proportional to 15,273.85, 21,078.74 and 8,561.64

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Solution

The fourth proportional to 15,273.85, 21,078.74 and 8,561.64 is: 11,815.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,273.85 : 21,078.74 = 8,561.64 : x
  2. Step 2: Convert to fraction form
    15,273.85/21,078.74 = 8,561.64/x
  3. Step 3: Cross multiply
    15,273.85x = 21,078.74 × 8,561.64
  4. Step 4: Simplify right side
    15,273.85x = 180,468,583.53
  5. Step 5: Solve for x
    x = 180,468,583.53/15,273.85
  6. Step 6: Final answer
    x = 11,815.53

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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.