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Finding the Fourth Proportional to 6,399.30, 8,812.65 and 5,495.79

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Solution

The fourth proportional to 6,399.30, 8,812.65 and 5,495.79 is: 7,568.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.30 : 8,812.65 = 5,495.79 : x
  2. Step 2: Convert to fraction form
    6,399.30/8,812.65 = 5,495.79/x
  3. Step 3: Cross multiply
    6,399.30x = 8,812.65 × 5,495.79
  4. Step 4: Simplify right side
    6,399.30x = 48,432,473.74
  5. Step 5: Solve for x
    x = 48,432,473.74/6,399.30
  6. Step 6: Final answer
    x = 7,568.40

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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.