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Finding the Fourth Proportional to 28,707.50, 43,062.90 and 10,239.50

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Solution

The fourth proportional to 28,707.50, 43,062.90 and 10,239.50 is: 15,359.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,707.50 : 43,062.90 = 10,239.50 : x
  2. Step 2: Convert to fraction form
    28,707.50/43,062.90 = 10,239.50/x
  3. Step 3: Cross multiply
    28,707.50x = 43,062.90 × 10,239.50
  4. Step 4: Simplify right side
    28,707.50x = 440,942,564.55
  5. Step 5: Solve for x
    x = 440,942,564.55/28,707.50
  6. Step 6: Final answer
    x = 15,359.84

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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.