Home / 6,420.61-8,861.46-3,903.51

Finding the Fourth Proportional to 6,420.61, 8,861.46 and 3,903.51

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Solution

The fourth proportional to 6,420.61, 8,861.46 and 3,903.51 is: 5,387.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.61 : 8,861.46 = 3,903.51 : x
  2. Step 2: Convert to fraction form
    6,420.61/8,861.46 = 3,903.51/x
  3. Step 3: Cross multiply
    6,420.61x = 8,861.46 × 3,903.51
  4. Step 4: Simplify right side
    6,420.61x = 34,590,797.72
  5. Step 5: Solve for x
    x = 34,590,797.72/6,420.61
  6. Step 6: Final answer
    x = 5,387.46

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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.