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Finding the Fourth Proportional to 43,806.60, 65,661.30 and 18,842.40

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Solution

The fourth proportional to 43,806.60, 65,661.30 and 18,842.40 is: 28,242.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,806.60 : 65,661.30 = 18,842.40 : x
  2. Step 2: Convert to fraction form
    43,806.60/65,661.30 = 18,842.40/x
  3. Step 3: Cross multiply
    43,806.60x = 65,661.30 × 18,842.40
  4. Step 4: Simplify right side
    43,806.60x = 1,237,216,479.12
  5. Step 5: Solve for x
    x = 1,237,216,479.12/43,806.60
  6. Step 6: Final answer
    x = 28,242.70

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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.