Home / 13,989.40-20,979.21-4,126.06

Finding the Fourth Proportional to 13,989.40, 20,979.21 and 4,126.06

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Solution

The fourth proportional to 13,989.40, 20,979.21 and 4,126.06 is: 6,187.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.40 : 20,979.21 = 4,126.06 : x
  2. Step 2: Convert to fraction form
    13,989.40/20,979.21 = 4,126.06/x
  3. Step 3: Cross multiply
    13,989.40x = 20,979.21 × 4,126.06
  4. Step 4: Simplify right side
    13,989.40x = 86,561,479.21
  5. Step 5: Solve for x
    x = 86,561,479.21/13,989.40
  6. Step 6: Final answer
    x = 6,187.65

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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.