Home / 13,986.72-20,981.12-4,126.43

Finding the Fourth Proportional to 13,986.72, 20,981.12 and 4,126.43

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Solution

The fourth proportional to 13,986.72, 20,981.12 and 4,126.43 is: 6,189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.72 : 20,981.12 = 4,126.43 : x
  2. Step 2: Convert to fraction form
    13,986.72/20,981.12 = 4,126.43/x
  3. Step 3: Cross multiply
    13,986.72x = 20,981.12 × 4,126.43
  4. Step 4: Simplify right side
    13,986.72x = 86,577,154.82
  5. Step 5: Solve for x
    x = 86,577,154.82/13,986.72
  6. Step 6: Final answer
    x = 6,189.95

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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.