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Finding the Fourth Proportional to 38,707.50, 58,071 and 11,005.50

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Solution

The fourth proportional to 38,707.50, 58,071 and 11,005.50 is: 16,511.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,707.50 : 58,071 = 11,005.50 : x
  2. Step 2: Convert to fraction form
    38,707.50/58,071 = 11,005.50/x
  3. Step 3: Cross multiply
    38,707.50x = 58,071 × 11,005.50
  4. Step 4: Simplify right side
    38,707.50x = 639,100,390.50
  5. Step 5: Solve for x
    x = 639,100,390.50/38,707.50
  6. Step 6: Final answer
    x = 16,511.02

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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.