Home / 6,421.80-9,618.30-5,269.80

Finding the Fourth Proportional to 6,421.80, 9,618.30 and 5,269.80

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Solution

The fourth proportional to 6,421.80, 9,618.30 and 5,269.80 is: 7,892.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.80 : 9,618.30 = 5,269.80 : x
  2. Step 2: Convert to fraction form
    6,421.80/9,618.30 = 5,269.80/x
  3. Step 3: Cross multiply
    6,421.80x = 9,618.30 × 5,269.80
  4. Step 4: Simplify right side
    6,421.80x = 50,686,517.34
  5. Step 5: Solve for x
    x = 50,686,517.34/6,421.80
  6. Step 6: Final answer
    x = 7,892.88

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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.