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Finding the Fourth Proportional to 12,275.55, 16,942.47 and 7,239.48

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Solution

The fourth proportional to 12,275.55, 16,942.47 and 7,239.48 is: 9,991.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,275.55 : 16,942.47 = 7,239.48 : x
  2. Step 2: Convert to fraction form
    12,275.55/16,942.47 = 7,239.48/x
  3. Step 3: Cross multiply
    12,275.55x = 16,942.47 × 7,239.48
  4. Step 4: Simplify right side
    12,275.55x = 122,654,582.03
  5. Step 5: Solve for x
    x = 122,654,582.03/12,275.55
  6. Step 6: Final answer
    x = 9,991.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.