Home / 21,021.93-31,541.31-8,542.91

Finding the Fourth Proportional to 21,021.93, 31,541.31 and 8,542.91

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Solution

The fourth proportional to 21,021.93, 31,541.31 and 8,542.91 is: 12,817.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.93 : 31,541.31 = 8,542.91 : x
  2. Step 2: Convert to fraction form
    21,021.93/31,541.31 = 8,542.91/x
  3. Step 3: Cross multiply
    21,021.93x = 31,541.31 × 8,542.91
  4. Step 4: Simplify right side
    21,021.93x = 269,454,651.47
  5. Step 5: Solve for x
    x = 269,454,651.47/21,021.93
  6. Step 6: Final answer
    x = 12,817.79

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1.5x scale

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.