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Finding the Fourth Proportional to 10,530.20, 15,771.54 and 7,743.80

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Solution

The fourth proportional to 10,530.20, 15,771.54 and 7,743.80 is: 11,598.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,530.20 : 15,771.54 = 7,743.80 : x
  2. Step 2: Convert to fraction form
    10,530.20/15,771.54 = 7,743.80/x
  3. Step 3: Cross multiply
    10,530.20x = 15,771.54 × 7,743.80
  4. Step 4: Simplify right side
    10,530.20x = 122,131,651.45
  5. Step 5: Solve for x
    x = 122,131,651.45/10,530.20
  6. Step 6: Final answer
    x = 11,598.23

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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.