Home / 8,420.72-12,623.94-3,487.28

Finding the Fourth Proportional to 8,420.72, 12,623.94 and 3,487.28

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Solution

The fourth proportional to 8,420.72, 12,623.94 and 3,487.28 is: 5,227.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.72 : 12,623.94 = 3,487.28 : x
  2. Step 2: Convert to fraction form
    8,420.72/12,623.94 = 3,487.28/x
  3. Step 3: Cross multiply
    8,420.72x = 12,623.94 × 3,487.28
  4. Step 4: Simplify right side
    8,420.72x = 44,023,213.48
  5. Step 5: Solve for x
    x = 44,023,213.48/8,420.72
  6. Step 6: Final answer
    x = 5,227.96

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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.