Home / 11,931.18-17,905.12-4,917.52

Finding the Fourth Proportional to 11,931.18, 17,905.12 and 4,917.52

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Solution

The fourth proportional to 11,931.18, 17,905.12 and 4,917.52 is: 7,379.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.18 : 17,905.12 = 4,917.52 : x
  2. Step 2: Convert to fraction form
    11,931.18/17,905.12 = 4,917.52/x
  3. Step 3: Cross multiply
    11,931.18x = 17,905.12 × 4,917.52
  4. Step 4: Simplify right side
    11,931.18x = 88,048,785.70
  5. Step 5: Solve for x
    x = 88,048,785.70/11,931.18
  6. Step 6: Final answer
    x = 7,379.72

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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.