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Finding the Fourth Proportional to 18,889.92, 26,061.48 and 11,813.76

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Solution

The fourth proportional to 18,889.92, 26,061.48 and 11,813.76 is: 16,298.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.92 : 26,061.48 = 11,813.76 : x
  2. Step 2: Convert to fraction form
    18,889.92/26,061.48 = 11,813.76/x
  3. Step 3: Cross multiply
    18,889.92x = 26,061.48 × 11,813.76
  4. Step 4: Simplify right side
    18,889.92x = 307,884,069.96
  5. Step 5: Solve for x
    x = 307,884,069.96/18,889.92
  6. Step 6: Final answer
    x = 16,298.86

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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.