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Finding the Fourth Proportional to 28,930.76, 43,422.87 and 17,859.08

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Solution

The fourth proportional to 28,930.76, 43,422.87 and 17,859.08 is: 26,805.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.76 : 43,422.87 = 17,859.08 : x
  2. Step 2: Convert to fraction form
    28,930.76/43,422.87 = 17,859.08/x
  3. Step 3: Cross multiply
    28,930.76x = 43,422.87 × 17,859.08
  4. Step 4: Simplify right side
    28,930.76x = 775,492,292.05
  5. Step 5: Solve for x
    x = 775,492,292.05/28,930.76
  6. Step 6: Final answer
    x = 26,805.12

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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.