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Finding the Fourth Proportional to 8,664.71, 12,995.64 and 3,117.02

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Solution

The fourth proportional to 8,664.71, 12,995.64 and 3,117.02 is: 4,675.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.71 : 12,995.64 = 3,117.02 : x
  2. Step 2: Convert to fraction form
    8,664.71/12,995.64 = 3,117.02/x
  3. Step 3: Cross multiply
    8,664.71x = 12,995.64 × 3,117.02
  4. Step 4: Simplify right side
    8,664.71x = 40,507,669.79
  5. Step 5: Solve for x
    x = 40,507,669.79/8,664.71
  6. Step 6: Final answer
    x = 4,675.02

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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.