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Finding the Fourth Proportional to 12,287.52, 16,954.20 and 7,809.64

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Solution

The fourth proportional to 12,287.52, 16,954.20 and 7,809.64 is: 10,775.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.52 : 16,954.20 = 7,809.64 : x
  2. Step 2: Convert to fraction form
    12,287.52/16,954.20 = 7,809.64/x
  3. Step 3: Cross multiply
    12,287.52x = 16,954.20 × 7,809.64
  4. Step 4: Simplify right side
    12,287.52x = 132,406,198.49
  5. Step 5: Solve for x
    x = 132,406,198.49/12,287.52
  6. Step 6: Final answer
    x = 10,775.66

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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.