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Finding the Fourth Proportional to 8,709.80, 13,057.50 and 4,330.32

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Solution

The fourth proportional to 8,709.80, 13,057.50 and 4,330.32 is: 6,491.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.80 : 13,057.50 = 4,330.32 : x
  2. Step 2: Convert to fraction form
    8,709.80/13,057.50 = 4,330.32/x
  3. Step 3: Cross multiply
    8,709.80x = 13,057.50 × 4,330.32
  4. Step 4: Simplify right side
    8,709.80x = 56,543,153.40
  5. Step 5: Solve for x
    x = 56,543,153.40/8,709.80
  6. Step 6: Final answer
    x = 6,491.90

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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.