Home / 21,022.93-31,542.81-8,543.91

Finding the Fourth Proportional to 21,022.93, 31,542.81 and 8,543.91

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Solution

The fourth proportional to 21,022.93, 31,542.81 and 8,543.91 is: 12,819.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.93 : 31,542.81 = 8,543.91 : x
  2. Step 2: Convert to fraction form
    21,022.93/31,542.81 = 8,543.91/x
  3. Step 3: Cross multiply
    21,022.93x = 31,542.81 × 8,543.91
  4. Step 4: Simplify right side
    21,022.93x = 269,498,929.79
  5. Step 5: Solve for x
    x = 269,498,929.79/21,022.93
  6. Step 6: Final answer
    x = 12,819.28

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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.