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Finding the Fourth Proportional to 18,457.70, 27,690.54 and 5,978.98

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Solution

The fourth proportional to 18,457.70, 27,690.54 and 5,978.98 is: 8,969.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,457.70 : 27,690.54 = 5,978.98 : x
  2. Step 2: Convert to fraction form
    18,457.70/27,690.54 = 5,978.98/x
  3. Step 3: Cross multiply
    18,457.70x = 27,690.54 × 5,978.98
  4. Step 4: Simplify right side
    18,457.70x = 165,561,184.85
  5. Step 5: Solve for x
    x = 165,561,184.85/18,457.70
  6. Step 6: Final answer
    x = 8,969.76

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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.