Home / 21,057.11-31,585.60-8,574.36

Finding the Fourth Proportional to 21,057.11, 31,585.60 and 8,574.36

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Solution

The fourth proportional to 21,057.11, 31,585.60 and 8,574.36 is: 12,861.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.11 : 31,585.60 = 8,574.36 : x
  2. Step 2: Convert to fraction form
    21,057.11/31,585.60 = 8,574.36/x
  3. Step 3: Cross multiply
    21,057.11x = 31,585.60 × 8,574.36
  4. Step 4: Simplify right side
    21,057.11x = 270,826,149.26
  5. Step 5: Solve for x
    x = 270,826,149.26/21,057.11
  6. Step 6: Final answer
    x = 12,861.50

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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.