Home / 21,253.05-31,814.78-12,461.85

Finding the Fourth Proportional to 21,253.05, 31,814.78 and 12,461.85

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Solution

The fourth proportional to 21,253.05, 31,814.78 and 12,461.85 is: 18,654.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.05 : 31,814.78 = 12,461.85 : x
  2. Step 2: Convert to fraction form
    21,253.05/31,814.78 = 12,461.85/x
  3. Step 3: Cross multiply
    21,253.05x = 31,814.78 × 12,461.85
  4. Step 4: Simplify right side
    21,253.05x = 396,470,953.83
  5. Step 5: Solve for x
    x = 396,470,953.83/21,253.05
  6. Step 6: Final answer
    x = 18,654.78

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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.