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Finding the Fourth Proportional to 18,000.40, 26,985.12 and 7,619.44

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Solution

The fourth proportional to 18,000.40, 26,985.12 and 7,619.44 is: 11,422.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,000.40 : 26,985.12 = 7,619.44 : x
  2. Step 2: Convert to fraction form
    18,000.40/26,985.12 = 7,619.44/x
  3. Step 3: Cross multiply
    18,000.40x = 26,985.12 × 7,619.44
  4. Step 4: Simplify right side
    18,000.40x = 205,611,502.73
  5. Step 5: Solve for x
    x = 205,611,502.73/18,000.40
  6. Step 6: Final answer
    x = 11,422.61

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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.