Home / 13,670.80-20,507.21-4,905.79

Finding the Fourth Proportional to 13,670.80, 20,507.21 and 4,905.79

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Solution

The fourth proportional to 13,670.80, 20,507.21 and 4,905.79 is: 7,359.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.80 : 20,507.21 = 4,905.79 : x
  2. Step 2: Convert to fraction form
    13,670.80/20,507.21 = 4,905.79/x
  3. Step 3: Cross multiply
    13,670.80x = 20,507.21 × 4,905.79
  4. Step 4: Simplify right side
    13,670.80x = 100,604,065.75
  5. Step 5: Solve for x
    x = 100,604,065.75/13,670.80
  6. Step 6: Final answer
    x = 7,359.05

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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.