Home / 15,215.50-20,999.28-9,249.22

Finding the Fourth Proportional to 15,215.50, 20,999.28 and 9,249.22

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Solution

The fourth proportional to 15,215.50, 20,999.28 and 9,249.22 is: 12,765.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.50 : 20,999.28 = 9,249.22 : x
  2. Step 2: Convert to fraction form
    15,215.50/20,999.28 = 9,249.22/x
  3. Step 3: Cross multiply
    15,215.50x = 20,999.28 × 9,249.22
  4. Step 4: Simplify right side
    15,215.50x = 194,226,960.56
  5. Step 5: Solve for x
    x = 194,226,960.56/15,215.50
  6. Step 6: Final answer
    x = 12,765.07

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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.