Home / 20,622.98-30,864.35-12,730.47

Finding the Fourth Proportional to 20,622.98, 30,864.35 and 12,730.47

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Solution

The fourth proportional to 20,622.98, 30,864.35 and 12,730.47 is: 19,052.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.98 : 30,864.35 = 12,730.47 : x
  2. Step 2: Convert to fraction form
    20,622.98/30,864.35 = 12,730.47/x
  3. Step 3: Cross multiply
    20,622.98x = 30,864.35 × 12,730.47
  4. Step 4: Simplify right side
    20,622.98x = 392,917,618.09
  5. Step 5: Solve for x
    x = 392,917,618.09/20,622.98
  6. Step 6: Final answer
    x = 19,052.42

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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.