Home / 20,215.09-30,328.10-11,456.16

Finding the Fourth Proportional to 20,215.09, 30,328.10 and 11,456.16

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Solution

The fourth proportional to 20,215.09, 30,328.10 and 11,456.16 is: 17,187.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.09 : 30,328.10 = 11,456.16 : x
  2. Step 2: Convert to fraction form
    20,215.09/30,328.10 = 11,456.16/x
  3. Step 3: Cross multiply
    20,215.09x = 30,328.10 × 11,456.16
  4. Step 4: Simplify right side
    20,215.09x = 347,443,438.05
  5. Step 5: Solve for x
    x = 347,443,438.05/20,215.09
  6. Step 6: Final answer
    x = 17,187.33

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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.