Home / 13,040.90-19,560.08-3,680.78

Finding the Fourth Proportional to 13,040.90, 19,560.08 and 3,680.78

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Solution

The fourth proportional to 13,040.90, 19,560.08 and 3,680.78 is: 5,520.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,040.90 : 19,560.08 = 3,680.78 : x
  2. Step 2: Convert to fraction form
    13,040.90/19,560.08 = 3,680.78/x
  3. Step 3: Cross multiply
    13,040.90x = 19,560.08 × 3,680.78
  4. Step 4: Simplify right side
    13,040.90x = 71,996,262.66
  5. Step 5: Solve for x
    x = 71,996,262.66/13,040.90
  6. Step 6: Final answer
    x = 5,520.81

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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.