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Finding the Fourth Proportional to 43,520, 65,270.84 and 21,311

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Solution

The fourth proportional to 43,520, 65,270.84 and 21,311 is: 31,962.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,520 : 65,270.84 = 21,311 : x
  2. Step 2: Convert to fraction form
    43,520/65,270.84 = 21,311/x
  3. Step 3: Cross multiply
    43,520x = 65,270.84 × 21,311
  4. Step 4: Simplify right side
    43,520x = 1,390,986,871.24
  5. Step 5: Solve for x
    x = 1,390,986,871.24/43,520
  6. Step 6: Final answer
    x = 31,962.01

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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.