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Finding the Fourth Proportional to 43,257.80, 64,860.48 and 21,048.80

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Solution

The fourth proportional to 43,257.80, 64,860.48 and 21,048.80 is: 31,560.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,257.80 : 64,860.48 = 21,048.80 : x
  2. Step 2: Convert to fraction form
    43,257.80/64,860.48 = 21,048.80/x
  3. Step 3: Cross multiply
    43,257.80x = 64,860.48 × 21,048.80
  4. Step 4: Simplify right side
    43,257.80x = 1,365,235,271.42
  5. Step 5: Solve for x
    x = 1,365,235,271.42/43,257.80
  6. Step 6: Final answer
    x = 31,560.44

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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.