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Finding the Fourth Proportional to 6,405.12, 8,839.12 and 3,572.68

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Solution

The fourth proportional to 6,405.12, 8,839.12 and 3,572.68 is: 4,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405.12 : 8,839.12 = 3,572.68 : x
  2. Step 2: Convert to fraction form
    6,405.12/8,839.12 = 3,572.68/x
  3. Step 3: Cross multiply
    6,405.12x = 8,839.12 × 3,572.68
  4. Step 4: Simplify right side
    6,405.12x = 31,579,347.24
  5. Step 5: Solve for x
    x = 31,579,347.24/6,405.12
  6. Step 6: Final answer
    x = 4,930.33

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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.