Home / 12,756.64-19,131.60-3,520.48

Finding the Fourth Proportional to 12,756.64, 19,131.60 and 3,520.48

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Solution

The fourth proportional to 12,756.64, 19,131.60 and 3,520.48 is: 5,279.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.64 : 19,131.60 = 3,520.48 : x
  2. Step 2: Convert to fraction form
    12,756.64/19,131.60 = 3,520.48/x
  3. Step 3: Cross multiply
    12,756.64x = 19,131.60 × 3,520.48
  4. Step 4: Simplify right side
    12,756.64x = 67,352,415.17
  5. Step 5: Solve for x
    x = 67,352,415.17/12,756.64
  6. Step 6: Final answer
    x = 5,279.79

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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.