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Finding the Fourth Proportional to 13,207.98, 18,226.98 and 7,239.86

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Solution

The fourth proportional to 13,207.98, 18,226.98 and 7,239.86 is: 9,990.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,207.98 : 18,226.98 = 7,239.86 : x
  2. Step 2: Convert to fraction form
    13,207.98/18,226.98 = 7,239.86/x
  3. Step 3: Cross multiply
    13,207.98x = 18,226.98 × 7,239.86
  4. Step 4: Simplify right side
    13,207.98x = 131,960,783.42
  5. Step 5: Solve for x
    x = 131,960,783.42/13,207.98
  6. Step 6: Final answer
    x = 9,990.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.