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Finding the Fourth Proportional to 14,819.91, 20,471.45 and 11,856.93

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Solution

The fourth proportional to 14,819.91, 20,471.45 and 11,856.93 is: 16,378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,819.91 : 20,471.45 = 11,856.93 : x
  2. Step 2: Convert to fraction form
    14,819.91/20,471.45 = 11,856.93/x
  3. Step 3: Cross multiply
    14,819.91x = 20,471.45 × 11,856.93
  4. Step 4: Simplify right side
    14,819.91x = 242,728,490.36
  5. Step 5: Solve for x
    x = 242,728,490.36/14,819.91
  6. Step 6: Final answer
    x = 16,378.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.