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Finding the Fourth Proportional to 18,697.91, 28,055.97 and 7,607.79

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Solution

The fourth proportional to 18,697.91, 28,055.97 and 7,607.79 is: 11,415.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.91 : 28,055.97 = 7,607.79 : x
  2. Step 2: Convert to fraction form
    18,697.91/28,055.97 = 7,607.79/x
  3. Step 3: Cross multiply
    18,697.91x = 28,055.97 × 7,607.79
  4. Step 4: Simplify right side
    18,697.91x = 213,443,928.01
  5. Step 5: Solve for x
    x = 213,443,928.01/18,697.91
  6. Step 6: Final answer
    x = 11,415.39

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1.5x scale

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.