Home / 15,215.96-20,999.58-8,930.36

Finding the Fourth Proportional to 15,215.96, 20,999.58 and 8,930.36

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Solution

The fourth proportional to 15,215.96, 20,999.58 and 8,930.36 is: 12,324.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.96 : 20,999.58 = 8,930.36 : x
  2. Step 2: Convert to fraction form
    15,215.96/20,999.58 = 8,930.36/x
  3. Step 3: Cross multiply
    15,215.96x = 20,999.58 × 8,930.36
  4. Step 4: Simplify right side
    15,215.96x = 187,533,809.25
  5. Step 5: Solve for x
    x = 187,533,809.25/15,215.96
  6. Step 6: Final answer
    x = 12,324.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.