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Finding the Fourth Proportional to 18,996.58, 28,494.87 and 5,146.66

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Solution

The fourth proportional to 18,996.58, 28,494.87 and 5,146.66 is: 7,719.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,996.58 : 28,494.87 = 5,146.66 : x
  2. Step 2: Convert to fraction form
    18,996.58/28,494.87 = 5,146.66/x
  3. Step 3: Cross multiply
    18,996.58x = 28,494.87 × 5,146.66
  4. Step 4: Simplify right side
    18,996.58x = 146,653,407.63
  5. Step 5: Solve for x
    x = 146,653,407.63/18,996.58
  6. Step 6: Final answer
    x = 7,719.99

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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.