Home / 21,243.54-31,821.57-12,457.27

Finding the Fourth Proportional to 21,243.54, 31,821.57 and 12,457.27

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Solution

The fourth proportional to 21,243.54, 31,821.57 and 12,457.27 is: 18,660.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.54 : 31,821.57 = 12,457.27 : x
  2. Step 2: Convert to fraction form
    21,243.54/31,821.57 = 12,457.27/x
  3. Step 3: Cross multiply
    21,243.54x = 31,821.57 × 12,457.27
  4. Step 4: Simplify right side
    21,243.54x = 396,409,929.09
  5. Step 5: Solve for x
    x = 396,409,929.09/21,243.54
  6. Step 6: Final answer
    x = 18,660.25

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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.