Home / 13,986.76-20,980-4,126.08

Finding the Fourth Proportional to 13,986.76, 20,980 and 4,126.08

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Solution

The fourth proportional to 13,986.76, 20,980 and 4,126.08 is: 6,189.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.76 : 20,980 = 4,126.08 : x
  2. Step 2: Convert to fraction form
    13,986.76/20,980 = 4,126.08/x
  3. Step 3: Cross multiply
    13,986.76x = 20,980 × 4,126.08
  4. Step 4: Simplify right side
    13,986.76x = 86,565,158.40
  5. Step 5: Solve for x
    x = 86,565,158.40/13,986.76
  6. Step 6: Final answer
    x = 6,189.08

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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.