Home / 13,179.68-19,739.28-8,423.36

Finding the Fourth Proportional to 13,179.68, 19,739.28 and 8,423.36

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Solution

The fourth proportional to 13,179.68, 19,739.28 and 8,423.36 is: 12,615.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.68 : 19,739.28 = 8,423.36 : x
  2. Step 2: Convert to fraction form
    13,179.68/19,739.28 = 8,423.36/x
  3. Step 3: Cross multiply
    13,179.68x = 19,739.28 × 8,423.36
  4. Step 4: Simplify right side
    13,179.68x = 166,271,061.58
  5. Step 5: Solve for x
    x = 166,271,061.58/13,179.68
  6. Step 6: Final answer
    x = 12,615.71

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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.