Home / 13,423.60-18,521.62-8,118.30

Finding the Fourth Proportional to 13,423.60, 18,521.62 and 8,118.30

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Solution

The fourth proportional to 13,423.60, 18,521.62 and 8,118.30 is: 11,201.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.60 : 18,521.62 = 8,118.30 : x
  2. Step 2: Convert to fraction form
    13,423.60/18,521.62 = 8,118.30/x
  3. Step 3: Cross multiply
    13,423.60x = 18,521.62 × 8,118.30
  4. Step 4: Simplify right side
    13,423.60x = 150,364,067.65
  5. Step 5: Solve for x
    x = 150,364,067.65/13,423.60
  6. Step 6: Final answer
    x = 11,201.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.