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Finding the Fourth Proportional to 18,703.99, 28,066.31 and 7,618.48

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Solution

The fourth proportional to 18,703.99, 28,066.31 and 7,618.48 is: 11,431.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.99 : 28,066.31 = 7,618.48 : x
  2. Step 2: Convert to fraction form
    18,703.99/28,066.31 = 7,618.48/x
  3. Step 3: Cross multiply
    18,703.99x = 28,066.31 × 7,618.48
  4. Step 4: Simplify right side
    18,703.99x = 213,822,442.98
  5. Step 5: Solve for x
    x = 213,822,442.98/18,703.99
  6. Step 6: Final answer
    x = 11,431.92

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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.