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Finding the Fourth Proportional to 12,625.38, 18,938.08 and 6,818.90

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Solution

The fourth proportional to 12,625.38, 18,938.08 and 6,818.90 is: 10,228.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,625.38 : 18,938.08 = 6,818.90 : x
  2. Step 2: Convert to fraction form
    12,625.38/18,938.08 = 6,818.90/x
  3. Step 3: Cross multiply
    12,625.38x = 18,938.08 × 6,818.90
  4. Step 4: Simplify right side
    12,625.38x = 129,136,873.71
  5. Step 5: Solve for x
    x = 129,136,873.71/12,625.38
  6. Step 6: Final answer
    x = 10,228.36

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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.