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Finding the Fourth Proportional to 18,980.51, 28,471.14 and 6,514.88

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Solution

The fourth proportional to 18,980.51, 28,471.14 and 6,514.88 is: 9,772.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.51 : 28,471.14 = 6,514.88 : x
  2. Step 2: Convert to fraction form
    18,980.51/28,471.14 = 6,514.88/x
  3. Step 3: Cross multiply
    18,980.51x = 28,471.14 × 6,514.88
  4. Step 4: Simplify right side
    18,980.51x = 185,485,918.21
  5. Step 5: Solve for x
    x = 185,485,918.21/18,980.51
  6. Step 6: Final answer
    x = 9,772.44

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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.