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Finding the Fourth Proportional to 43,697.80, 65,562.90 and 17,421.40

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Solution

The fourth proportional to 43,697.80, 65,562.90 and 17,421.40 is: 26,138.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,697.80 : 65,562.90 = 17,421.40 : x
  2. Step 2: Convert to fraction form
    43,697.80/65,562.90 = 17,421.40/x
  3. Step 3: Cross multiply
    43,697.80x = 65,562.90 × 17,421.40
  4. Step 4: Simplify right side
    43,697.80x = 1,142,197,506.06
  5. Step 5: Solve for x
    x = 1,142,197,506.06/43,697.80
  6. Step 6: Final answer
    x = 26,138.56

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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.