Home / 6,420.18-8,860.05-3,625.86

Finding the Fourth Proportional to 6,420.18, 8,860.05 and 3,625.86

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Solution

The fourth proportional to 6,420.18, 8,860.05 and 3,625.86 is: 5,003.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.18 : 8,860.05 = 3,625.86 : x
  2. Step 2: Convert to fraction form
    6,420.18/8,860.05 = 3,625.86/x
  3. Step 3: Cross multiply
    6,420.18x = 8,860.05 × 3,625.86
  4. Step 4: Simplify right side
    6,420.18x = 32,125,300.89
  5. Step 5: Solve for x
    x = 32,125,300.89/6,420.18
  6. Step 6: Final answer
    x = 5,003.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.