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Finding the Fourth Proportional to 43,786.58, 65,695.36 and 21,615.50

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Solution

The fourth proportional to 43,786.58, 65,695.36 and 21,615.50 is: 32,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,786.58 : 65,695.36 = 21,615.50 : x
  2. Step 2: Convert to fraction form
    43,786.58/65,695.36 = 21,615.50/x
  3. Step 3: Cross multiply
    43,786.58x = 65,695.36 × 21,615.50
  4. Step 4: Simplify right side
    43,786.58x = 1,420,038,054.08
  5. Step 5: Solve for x
    x = 1,420,038,054.08/43,786.58
  6. Step 6: Final answer
    x = 32,430.90

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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.