Home / 8,420.70-12,633.75-3,490.86

Finding the Fourth Proportional to 8,420.70, 12,633.75 and 3,490.86

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Solution

The fourth proportional to 8,420.70, 12,633.75 and 3,490.86 is: 5,237.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.70 : 12,633.75 = 3,490.86 : x
  2. Step 2: Convert to fraction form
    8,420.70/12,633.75 = 3,490.86/x
  3. Step 3: Cross multiply
    8,420.70x = 12,633.75 × 3,490.86
  4. Step 4: Simplify right side
    8,420.70x = 44,102,652.53
  5. Step 5: Solve for x
    x = 44,102,652.53/8,420.70
  6. Step 6: Final answer
    x = 5,237.41

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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.