Home / 8,390.84-12,578.96-4,227.35

Finding the Fourth Proportional to 8,390.84, 12,578.96 and 4,227.35

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Solution

The fourth proportional to 8,390.84, 12,578.96 and 4,227.35 is: 6,337.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.84 : 12,578.96 = 4,227.35 : x
  2. Step 2: Convert to fraction form
    8,390.84/12,578.96 = 4,227.35/x
  3. Step 3: Cross multiply
    8,390.84x = 12,578.96 × 4,227.35
  4. Step 4: Simplify right side
    8,390.84x = 53,175,614.23
  5. Step 5: Solve for x
    x = 53,175,614.23/8,390.84
  6. Step 6: Final answer
    x = 6,337.34

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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.