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Finding the Fourth Proportional to 29,139.60, 43,709.40 and 8,360.40

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Solution

The fourth proportional to 29,139.60, 43,709.40 and 8,360.40 is: 12,540.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,139.60 : 43,709.40 = 8,360.40 : x
  2. Step 2: Convert to fraction form
    29,139.60/43,709.40 = 8,360.40/x
  3. Step 3: Cross multiply
    29,139.60x = 43,709.40 × 8,360.40
  4. Step 4: Simplify right side
    29,139.60x = 365,428,067.76
  5. Step 5: Solve for x
    x = 365,428,067.76/29,139.60
  6. Step 6: Final answer
    x = 12,540.60

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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.