Home / 13,218.18-18,234.80-7,911.98

Finding the Fourth Proportional to 13,218.18, 18,234.80 and 7,911.98

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Solution

The fourth proportional to 13,218.18, 18,234.80 and 7,911.98 is: 10,914.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.18 : 18,234.80 = 7,911.98 : x
  2. Step 2: Convert to fraction form
    13,218.18/18,234.80 = 7,911.98/x
  3. Step 3: Cross multiply
    13,218.18x = 18,234.80 × 7,911.98
  4. Step 4: Simplify right side
    13,218.18x = 144,273,281.73
  5. Step 5: Solve for x
    x = 144,273,281.73/13,218.18
  6. Step 6: Final answer
    x = 10,914.76

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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.