Home / 20,139.48-27,792.30-11,187

Finding the Fourth Proportional to 20,139.48, 27,792.30 and 11,187

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Solution

The fourth proportional to 20,139.48, 27,792.30 and 11,187 is: 15,437.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.48 : 27,792.30 = 11,187 : x
  2. Step 2: Convert to fraction form
    20,139.48/27,792.30 = 11,187/x
  3. Step 3: Cross multiply
    20,139.48x = 27,792.30 × 11,187
  4. Step 4: Simplify right side
    20,139.48x = 310,912,460.10
  5. Step 5: Solve for x
    x = 310,912,460.10/20,139.48
  6. Step 6: Final answer
    x = 15,437.96

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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.