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Finding the Fourth Proportional to 29,658.78, 44,495.30 and 12,128.60

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Solution

The fourth proportional to 29,658.78, 44,495.30 and 12,128.60 is: 18,195.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,658.78 : 44,495.30 = 12,128.60 : x
  2. Step 2: Convert to fraction form
    29,658.78/44,495.30 = 12,128.60/x
  3. Step 3: Cross multiply
    29,658.78x = 44,495.30 × 12,128.60
  4. Step 4: Simplify right side
    29,658.78x = 539,665,695.58
  5. Step 5: Solve for x
    x = 539,665,695.58/29,658.78
  6. Step 6: Final answer
    x = 18,195.82

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1.5x scale

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.