Home / 6,420.18-8,857.04-3,766.40

Finding the Fourth Proportional to 6,420.18, 8,857.04 and 3,766.40

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Solution

The fourth proportional to 6,420.18, 8,857.04 and 3,766.40 is: 5,195.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.18 : 8,857.04 = 3,766.40 : x
  2. Step 2: Convert to fraction form
    6,420.18/8,857.04 = 3,766.40/x
  3. Step 3: Cross multiply
    6,420.18x = 8,857.04 × 3,766.40
  4. Step 4: Simplify right side
    6,420.18x = 33,359,125.55
  5. Step 5: Solve for x
    x = 33,359,125.55/6,420.18
  6. Step 6: Final answer
    x = 5,195.98

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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.