Home / 13,840.11-20,763.63-3,979.39

Finding the Fourth Proportional to 13,840.11, 20,763.63 and 3,979.39

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Solution

The fourth proportional to 13,840.11, 20,763.63 and 3,979.39 is: 5,970.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.11 : 20,763.63 = 3,979.39 : x
  2. Step 2: Convert to fraction form
    13,840.11/20,763.63 = 3,979.39/x
  3. Step 3: Cross multiply
    13,840.11x = 20,763.63 × 3,979.39
  4. Step 4: Simplify right side
    13,840.11x = 82,626,561.69
  5. Step 5: Solve for x
    x = 82,626,561.69/13,840.11
  6. Step 6: Final answer
    x = 5,970.08

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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.