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Finding the Fourth Proportional to 19,318.56, 28,992.48 and 12,742.56

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Solution

The fourth proportional to 19,318.56, 28,992.48 and 12,742.56 is: 19,123.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,318.56 : 28,992.48 = 12,742.56 : x
  2. Step 2: Convert to fraction form
    19,318.56/28,992.48 = 12,742.56/x
  3. Step 3: Cross multiply
    19,318.56x = 28,992.48 × 12,742.56
  4. Step 4: Simplify right side
    19,318.56x = 369,438,415.95
  5. Step 5: Solve for x
    x = 369,438,415.95/19,318.56
  6. Step 6: Final answer
    x = 19,123.50

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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.