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Finding the Fourth Proportional to 14,620.30, 20,175.95 and 7,905.87

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Solution

The fourth proportional to 14,620.30, 20,175.95 and 7,905.87 is: 10,910.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,620.30 : 20,175.95 = 7,905.87 : x
  2. Step 2: Convert to fraction form
    14,620.30/20,175.95 = 7,905.87/x
  3. Step 3: Cross multiply
    14,620.30x = 20,175.95 × 7,905.87
  4. Step 4: Simplify right side
    14,620.30x = 159,508,457.59
  5. Step 5: Solve for x
    x = 159,508,457.59/14,620.30
  6. Step 6: Final answer
    x = 10,910.07

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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.