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Finding the Fourth Proportional to 28,809.99, 43,207.70 and 9,078.39

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Solution

The fourth proportional to 28,809.99, 43,207.70 and 9,078.39 is: 13,615.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,809.99 : 43,207.70 = 9,078.39 : x
  2. Step 2: Convert to fraction form
    28,809.99/43,207.70 = 9,078.39/x
  3. Step 3: Cross multiply
    28,809.99x = 43,207.70 × 9,078.39
  4. Step 4: Simplify right side
    28,809.99x = 392,256,306.21
  5. Step 5: Solve for x
    x = 392,256,306.21/28,809.99
  6. Step 6: Final answer
    x = 13,615.29

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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.