Home / 14,121.30-21,149.55-8,289.30

Finding the Fourth Proportional to 14,121.30, 21,149.55 and 8,289.30

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Solution

The fourth proportional to 14,121.30, 21,149.55 and 8,289.30 is: 12,414.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.30 : 21,149.55 = 8,289.30 : x
  2. Step 2: Convert to fraction form
    14,121.30/21,149.55 = 8,289.30/x
  3. Step 3: Cross multiply
    14,121.30x = 21,149.55 × 8,289.30
  4. Step 4: Simplify right side
    14,121.30x = 175,314,964.82
  5. Step 5: Solve for x
    x = 175,314,964.82/14,121.30
  6. Step 6: Final answer
    x = 12,414.93

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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.