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Finding the Fourth Proportional to 6,409.96, 9,615.90 and 4,359.40

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Solution

The fourth proportional to 6,409.96, 9,615.90 and 4,359.40 is: 6,539.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.96 : 9,615.90 = 4,359.40 : x
  2. Step 2: Convert to fraction form
    6,409.96/9,615.90 = 4,359.40/x
  3. Step 3: Cross multiply
    6,409.96x = 9,615.90 × 4,359.40
  4. Step 4: Simplify right side
    6,409.96x = 41,919,554.46
  5. Step 5: Solve for x
    x = 41,919,554.46/6,409.96
  6. Step 6: Final answer
    x = 6,539.75

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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.