Home / 21,062.80-31,585.42-8,574.36

Finding the Fourth Proportional to 21,062.80, 31,585.42 and 8,574.36

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Solution

The fourth proportional to 21,062.80, 31,585.42 and 8,574.36 is: 12,857.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.80 : 31,585.42 = 8,574.36 : x
  2. Step 2: Convert to fraction form
    21,062.80/31,585.42 = 8,574.36/x
  3. Step 3: Cross multiply
    21,062.80x = 31,585.42 × 8,574.36
  4. Step 4: Simplify right side
    21,062.80x = 270,824,761.83
  5. Step 5: Solve for x
    x = 270,824,761.83/21,062.80
  6. Step 6: Final answer
    x = 12,857.97

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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.