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Finding the Fourth Proportional to 14,619.50, 20,174.92 and 7,905.12

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Solution

The fourth proportional to 14,619.50, 20,174.92 and 7,905.12 is: 10,909.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,619.50 : 20,174.92 = 7,905.12 : x
  2. Step 2: Convert to fraction form
    14,619.50/20,174.92 = 7,905.12/x
  3. Step 3: Cross multiply
    14,619.50x = 20,174.92 × 7,905.12
  4. Step 4: Simplify right side
    14,619.50x = 159,485,143.83
  5. Step 5: Solve for x
    x = 159,485,143.83/14,619.50
  6. Step 6: Final answer
    x = 10,909.07

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1.5x scale

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.