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Finding the Fourth Proportional to 4,707.76, 7,061.64 and 2,108.87

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Solution

The fourth proportional to 4,707.76, 7,061.64 and 2,108.87 is: 3,163.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,707.76 : 7,061.64 = 2,108.87 : x
  2. Step 2: Convert to fraction form
    4,707.76/7,061.64 = 2,108.87/x
  3. Step 3: Cross multiply
    4,707.76x = 7,061.64 × 2,108.87
  4. Step 4: Simplify right side
    4,707.76x = 14,892,070.20
  5. Step 5: Solve for x
    x = 14,892,070.20/4,707.76
  6. Step 6: Final answer
    x = 3,163.31

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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.