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Finding the Fourth Proportional to 43,783.40, 65,639.10 and 18,842.60

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Solution

The fourth proportional to 43,783.40, 65,639.10 and 18,842.60 is: 28,248.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,783.40 : 65,639.10 = 18,842.60 : x
  2. Step 2: Convert to fraction form
    43,783.40/65,639.10 = 18,842.60/x
  3. Step 3: Cross multiply
    43,783.40x = 65,639.10 × 18,842.60
  4. Step 4: Simplify right side
    43,783.40x = 1,236,811,305.66
  5. Step 5: Solve for x
    x = 1,236,811,305.66/43,783.40
  6. Step 6: Final answer
    x = 28,248.41

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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.