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Finding the Fourth Proportional to 8,879.67, 13,315.19 and 4,721.67

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Solution

The fourth proportional to 8,879.67, 13,315.19 and 4,721.67 is: 7,080.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.67 : 13,315.19 = 4,721.67 : x
  2. Step 2: Convert to fraction form
    8,879.67/13,315.19 = 4,721.67/x
  3. Step 3: Cross multiply
    8,879.67x = 13,315.19 × 4,721.67
  4. Step 4: Simplify right side
    8,879.67x = 62,869,909.56
  5. Step 5: Solve for x
    x = 62,869,909.56/8,879.67
  6. Step 6: Final answer
    x = 7,080.21

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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.