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Finding the Fourth Proportional to 19,278.40, 28,874.40 and 11,502.40

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Solution

The fourth proportional to 19,278.40, 28,874.40 and 11,502.40 is: 17,227.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,278.40 : 28,874.40 = 11,502.40 : x
  2. Step 2: Convert to fraction form
    19,278.40/28,874.40 = 11,502.40/x
  3. Step 3: Cross multiply
    19,278.40x = 28,874.40 × 11,502.40
  4. Step 4: Simplify right side
    19,278.40x = 332,124,898.56
  5. Step 5: Solve for x
    x = 332,124,898.56/19,278.40
  6. Step 6: Final answer
    x = 17,227.82

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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.