Home / 21,210.24-31,815.38-6,418.84

Finding the Fourth Proportional to 21,210.24, 31,815.38 and 6,418.84

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Solution

The fourth proportional to 21,210.24, 31,815.38 and 6,418.84 is: 9,628.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.24 : 31,815.38 = 6,418.84 : x
  2. Step 2: Convert to fraction form
    21,210.24/31,815.38 = 6,418.84/x
  3. Step 3: Cross multiply
    21,210.24x = 31,815.38 × 6,418.84
  4. Step 4: Simplify right side
    21,210.24x = 204,217,833.76
  5. Step 5: Solve for x
    x = 204,217,833.76/21,210.24
  6. Step 6: Final answer
    x = 9,628.27

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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.