Home / 13,479.21-20,218.09-5,158.59

Finding the Fourth Proportional to 13,479.21, 20,218.09 and 5,158.59

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Solution

The fourth proportional to 13,479.21, 20,218.09 and 5,158.59 is: 7,737.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.21 : 20,218.09 = 5,158.59 : x
  2. Step 2: Convert to fraction form
    13,479.21/20,218.09 = 5,158.59/x
  3. Step 3: Cross multiply
    13,479.21x = 20,218.09 × 5,158.59
  4. Step 4: Simplify right side
    13,479.21x = 104,296,836.89
  5. Step 5: Solve for x
    x = 104,296,836.89/13,479.21
  6. Step 6: Final answer
    x = 7,737.61

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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.