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Finding the Fourth Proportional to 29,656.80, 44,485.20 and 12,139.20

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Solution

The fourth proportional to 29,656.80, 44,485.20 and 12,139.20 is: 18,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,656.80 : 44,485.20 = 12,139.20 : x
  2. Step 2: Convert to fraction form
    29,656.80/44,485.20 = 12,139.20/x
  3. Step 3: Cross multiply
    29,656.80x = 44,485.20 × 12,139.20
  4. Step 4: Simplify right side
    29,656.80x = 540,014,739.84
  5. Step 5: Solve for x
    x = 540,014,739.84/29,656.80
  6. Step 6: Final answer
    x = 18,208.80

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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.