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Finding the Fourth Proportional to 28,702, 43,059.90 and 9,979.30

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Solution

The fourth proportional to 28,702, 43,059.90 and 9,979.30 is: 14,971.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,702 : 43,059.90 = 9,979.30 : x
  2. Step 2: Convert to fraction form
    28,702/43,059.90 = 9,979.30/x
  3. Step 3: Cross multiply
    28,702x = 43,059.90 × 9,979.30
  4. Step 4: Simplify right side
    28,702x = 429,707,660.07
  5. Step 5: Solve for x
    x = 429,707,660.07/28,702
  6. Step 6: Final answer
    x = 14,971.35

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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.