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Finding the Fourth Proportional to 18,459.98, 27,688.99 and 5,311.83

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Solution

The fourth proportional to 18,459.98, 27,688.99 and 5,311.83 is: 7,967.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,459.98 : 27,688.99 = 5,311.83 : x
  2. Step 2: Convert to fraction form
    18,459.98/27,688.99 = 5,311.83/x
  3. Step 3: Cross multiply
    18,459.98x = 27,688.99 × 5,311.83
  4. Step 4: Simplify right side
    18,459.98x = 147,079,207.75
  5. Step 5: Solve for x
    x = 147,079,207.75/18,459.98
  6. Step 6: Final answer
    x = 7,967.46

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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.