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Finding the Fourth Proportional to 43,508.91, 65,271.53 and 13,918.80

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Solution

The fourth proportional to 43,508.91, 65,271.53 and 13,918.80 is: 20,880.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,508.91 : 65,271.53 = 13,918.80 : x
  2. Step 2: Convert to fraction form
    43,508.91/65,271.53 = 13,918.80/x
  3. Step 3: Cross multiply
    43,508.91x = 65,271.53 × 13,918.80
  4. Step 4: Simplify right side
    43,508.91x = 908,500,975.81
  5. Step 5: Solve for x
    x = 908,500,975.81/43,508.91
  6. Step 6: Final answer
    x = 20,880.81

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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.