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Finding the Fourth Proportional to 43,308, 64,987.92 and 18,684

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Solution

The fourth proportional to 43,308, 64,987.92 and 18,684 is: 28,037.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,308 : 64,987.92 = 18,684 : x
  2. Step 2: Convert to fraction form
    43,308/64,987.92 = 18,684/x
  3. Step 3: Cross multiply
    43,308x = 64,987.92 × 18,684
  4. Step 4: Simplify right side
    43,308x = 1,214,234,297.28
  5. Step 5: Solve for x
    x = 1,214,234,297.28/43,308
  6. Step 6: Final answer
    x = 28,037.18

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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.