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Finding the Fourth Proportional to 18,686.61, 28,026.68 and 6,997.41

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Solution

The fourth proportional to 18,686.61, 28,026.68 and 6,997.41 is: 10,494.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.61 : 28,026.68 = 6,997.41 : x
  2. Step 2: Convert to fraction form
    18,686.61/28,026.68 = 6,997.41/x
  3. Step 3: Cross multiply
    18,686.61x = 28,026.68 × 6,997.41
  4. Step 4: Simplify right side
    18,686.61x = 196,114,135.91
  5. Step 5: Solve for x
    x = 196,114,135.91/18,686.61
  6. Step 6: Final answer
    x = 10,494.90

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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.