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Finding the Fourth Proportional to 28,979.71, 43,469.60 and 9,259.79

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Solution

The fourth proportional to 28,979.71, 43,469.60 and 9,259.79 is: 13,889.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979.71 : 43,469.60 = 9,259.79 : x
  2. Step 2: Convert to fraction form
    28,979.71/43,469.60 = 9,259.79/x
  3. Step 3: Cross multiply
    28,979.71x = 43,469.60 × 9,259.79
  4. Step 4: Simplify right side
    28,979.71x = 402,519,103.74
  5. Step 5: Solve for x
    x = 402,519,103.74/28,979.71
  6. Step 6: Final answer
    x = 13,889.69

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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.