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Finding the Fourth Proportional to 28,750, 43,125 and 7,973.50

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Solution

The fourth proportional to 28,750, 43,125 and 7,973.50 is: 11,960.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,750 : 43,125 = 7,973.50 : x
  2. Step 2: Convert to fraction form
    28,750/43,125 = 7,973.50/x
  3. Step 3: Cross multiply
    28,750x = 43,125 × 7,973.50
  4. Step 4: Simplify right side
    28,750x = 343,857,187.50
  5. Step 5: Solve for x
    x = 343,857,187.50/28,750
  6. Step 6: Final answer
    x = 11,960.25

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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.