Home / 5,461.20-8,191.80-2,688.30

Finding the Fourth Proportional to 5,461.20, 8,191.80 and 2,688.30

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Solution

The fourth proportional to 5,461.20, 8,191.80 and 2,688.30 is: 4,032.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,461.20 : 8,191.80 = 2,688.30 : x
  2. Step 2: Convert to fraction form
    5,461.20/8,191.80 = 2,688.30/x
  3. Step 3: Cross multiply
    5,461.20x = 8,191.80 × 2,688.30
  4. Step 4: Simplify right side
    5,461.20x = 22,022,015.94
  5. Step 5: Solve for x
    x = 22,022,015.94/5,461.20
  6. Step 6: Final answer
    x = 4,032.45

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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.