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Finding the Fourth Proportional to 28,939.12, 43,409.04 and 9,217.60

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Solution

The fourth proportional to 28,939.12, 43,409.04 and 9,217.60 is: 13,826.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.12 : 43,409.04 = 9,217.60 : x
  2. Step 2: Convert to fraction form
    28,939.12/43,409.04 = 9,217.60/x
  3. Step 3: Cross multiply
    28,939.12x = 43,409.04 × 9,217.60
  4. Step 4: Simplify right side
    28,939.12x = 400,127,167.10
  5. Step 5: Solve for x
    x = 400,127,167.10/28,939.12
  6. Step 6: Final answer
    x = 13,826.51

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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.