Home / 20,331.16-28,057.14-11,379.49

Finding the Fourth Proportional to 20,331.16, 28,057.14 and 11,379.49

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Solution

The fourth proportional to 20,331.16, 28,057.14 and 11,379.49 is: 15,703.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.16 : 28,057.14 = 11,379.49 : x
  2. Step 2: Convert to fraction form
    20,331.16/28,057.14 = 11,379.49/x
  3. Step 3: Cross multiply
    20,331.16x = 28,057.14 × 11,379.49
  4. Step 4: Simplify right side
    20,331.16x = 319,275,944.06
  5. Step 5: Solve for x
    x = 319,275,944.06/20,331.16
  6. Step 6: Final answer
    x = 15,703.77

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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.