Home / 14,121.90-21,170.70-8,569.35

Finding the Fourth Proportional to 14,121.90, 21,170.70 and 8,569.35

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Solution

The fourth proportional to 14,121.90, 21,170.70 and 8,569.35 is: 12,846.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.90 : 21,170.70 = 8,569.35 : x
  2. Step 2: Convert to fraction form
    14,121.90/21,170.70 = 8,569.35/x
  3. Step 3: Cross multiply
    14,121.90x = 21,170.70 × 8,569.35
  4. Step 4: Simplify right side
    14,121.90x = 181,419,138.05
  5. Step 5: Solve for x
    x = 181,419,138.05/14,121.90
  6. Step 6: Final answer
    x = 12,846.65

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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.