Home / 13,263.78-18,318.27-8,239.93

Finding the Fourth Proportional to 13,263.78, 18,318.27 and 8,239.93

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Solution

The fourth proportional to 13,263.78, 18,318.27 and 8,239.93 is: 11,379.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,263.78 : 18,318.27 = 8,239.93 : x
  2. Step 2: Convert to fraction form
    13,263.78/18,318.27 = 8,239.93/x
  3. Step 3: Cross multiply
    13,263.78x = 18,318.27 × 8,239.93
  4. Step 4: Simplify right side
    13,263.78x = 150,941,262.52
  5. Step 5: Solve for x
    x = 150,941,262.52/13,263.78
  6. Step 6: Final answer
    x = 11,379.96

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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.