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Finding the Fourth Proportional to 8,685.09, 12,964.75 and 7,634.16

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Solution

The fourth proportional to 8,685.09, 12,964.75 and 7,634.16 is: 11,395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.09 : 12,964.75 = 7,634.16 : x
  2. Step 2: Convert to fraction form
    8,685.09/12,964.75 = 7,634.16/x
  3. Step 3: Cross multiply
    8,685.09x = 12,964.75 × 7,634.16
  4. Step 4: Simplify right side
    8,685.09x = 98,974,956.77
  5. Step 5: Solve for x
    x = 98,974,956.77/8,685.09
  6. Step 6: Final answer
    x = 11,395.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.