Home / 11,520.63-17,280.83-5,278.88

Finding the Fourth Proportional to 11,520.63, 17,280.83 and 5,278.88

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Solution

The fourth proportional to 11,520.63, 17,280.83 and 5,278.88 is: 7,918.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,520.63 : 17,280.83 = 5,278.88 : x
  2. Step 2: Convert to fraction form
    11,520.63/17,280.83 = 5,278.88/x
  3. Step 3: Cross multiply
    11,520.63x = 17,280.83 × 5,278.88
  4. Step 4: Simplify right side
    11,520.63x = 91,223,427.87
  5. Step 5: Solve for x
    x = 91,223,427.87/11,520.63
  6. Step 6: Final answer
    x = 7,918.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.