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Finding the Fourth Proportional to 18,655.74, 27,983.61 and 12,794.58

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Solution

The fourth proportional to 18,655.74, 27,983.61 and 12,794.58 is: 19,191.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.74 : 27,983.61 = 12,794.58 : x
  2. Step 2: Convert to fraction form
    18,655.74/27,983.61 = 12,794.58/x
  3. Step 3: Cross multiply
    18,655.74x = 27,983.61 × 12,794.58
  4. Step 4: Simplify right side
    18,655.74x = 358,038,536.83
  5. Step 5: Solve for x
    x = 358,038,536.83/18,655.74
  6. Step 6: Final answer
    x = 19,191.87

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Similar ratio
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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.