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Finding the Fourth Proportional to 8,605.30, 11,859.21 and 6,713.88

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Solution

The fourth proportional to 8,605.30, 11,859.21 and 6,713.88 is: 9,252.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.30 : 11,859.21 = 6,713.88 : x
  2. Step 2: Convert to fraction form
    8,605.30/11,859.21 = 6,713.88/x
  3. Step 3: Cross multiply
    8,605.30x = 11,859.21 × 6,713.88
  4. Step 4: Simplify right side
    8,605.30x = 79,621,312.83
  5. Step 5: Solve for x
    x = 79,621,312.83/8,605.30
  6. Step 6: Final answer
    x = 9,252.59

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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.