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Finding the Fourth Proportional to 12,637.71, 18,917.69 and 8,245.71

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Solution

The fourth proportional to 12,637.71, 18,917.69 and 8,245.71 is: 12,343.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,637.71 : 18,917.69 = 8,245.71 : x
  2. Step 2: Convert to fraction form
    12,637.71/18,917.69 = 8,245.71/x
  3. Step 3: Cross multiply
    12,637.71x = 18,917.69 × 8,245.71
  4. Step 4: Simplify right side
    12,637.71x = 155,989,744.38
  5. Step 5: Solve for x
    x = 155,989,744.38/12,637.71
  6. Step 6: Final answer
    x = 12,343.20

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1.5x scale

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.