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Finding the Fourth Proportional to 6,407.64, 8,842.59 and 3,889.08

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Solution

The fourth proportional to 6,407.64, 8,842.59 and 3,889.08 is: 5,366.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,407.64 : 8,842.59 = 3,889.08 : x
  2. Step 2: Convert to fraction form
    6,407.64/8,842.59 = 3,889.08/x
  3. Step 3: Cross multiply
    6,407.64x = 8,842.59 × 3,889.08
  4. Step 4: Simplify right side
    6,407.64x = 34,389,539.92
  5. Step 5: Solve for x
    x = 34,389,539.92/6,407.64
  6. Step 6: Final answer
    x = 5,366.96

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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.