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Finding the Fourth Proportional to 12,358.79, 18,538.02 and 2,998.88

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Solution

The fourth proportional to 12,358.79, 18,538.02 and 2,998.88 is: 4,498.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,358.79 : 18,538.02 = 2,998.88 : x
  2. Step 2: Convert to fraction form
    12,358.79/18,538.02 = 2,998.88/x
  3. Step 3: Cross multiply
    12,358.79x = 18,538.02 × 2,998.88
  4. Step 4: Simplify right side
    12,358.79x = 55,593,204.73
  5. Step 5: Solve for x
    x = 55,593,204.73/12,358.79
  6. Step 6: Final answer
    x = 4,498.27

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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.