Home / 14,147.15-21,220.82-4,286.40

Finding the Fourth Proportional to 14,147.15, 21,220.82 and 4,286.40

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Solution

The fourth proportional to 14,147.15, 21,220.82 and 4,286.40 is: 6,429.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,147.15 : 21,220.82 = 4,286.40 : x
  2. Step 2: Convert to fraction form
    14,147.15/21,220.82 = 4,286.40/x
  3. Step 3: Cross multiply
    14,147.15x = 21,220.82 × 4,286.40
  4. Step 4: Simplify right side
    14,147.15x = 90,960,901.42
  5. Step 5: Solve for x
    x = 90,960,901.42/14,147.15
  6. Step 6: Final answer
    x = 6,429.63

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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.