Home / 28,879.31-40,057.34-28,111.21

Finding the Fourth Proportional to 28,879.31, 40,057.34 and 28,111.21

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Solution

The fourth proportional to 28,879.31, 40,057.34 and 28,111.21 is: 38,991.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,879.31 : 40,057.34 = 28,111.21 : x
  2. Step 2: Convert to fraction form
    28,879.31/40,057.34 = 28,111.21/x
  3. Step 3: Cross multiply
    28,879.31x = 40,057.34 × 28,111.21
  4. Step 4: Simplify right side
    28,879.31x = 1,126,060,156.23
  5. Step 5: Solve for x
    x = 1,126,060,156.23/28,879.31
  6. Step 6: Final answer
    x = 38,991.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.