Home / 13,215.10-18,227.28-11,222.50

Finding the Fourth Proportional to 13,215.10, 18,227.28 and 11,222.50

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Solution

The fourth proportional to 13,215.10, 18,227.28 and 11,222.50 is: 15,478.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.10 : 18,227.28 = 11,222.50 : x
  2. Step 2: Convert to fraction form
    13,215.10/18,227.28 = 11,222.50/x
  3. Step 3: Cross multiply
    13,215.10x = 18,227.28 × 11,222.50
  4. Step 4: Simplify right side
    13,215.10x = 204,555,649.80
  5. Step 5: Solve for x
    x = 204,555,649.80/13,215.10
  6. Step 6: Final answer
    x = 15,478.93

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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.