Home / 20,331.15-28,058.22-11,378.46

Finding the Fourth Proportional to 20,331.15, 28,058.22 and 11,378.46

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Solution

The fourth proportional to 20,331.15, 28,058.22 and 11,378.46 is: 15,702.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.15 : 28,058.22 = 11,378.46 : x
  2. Step 2: Convert to fraction form
    20,331.15/28,058.22 = 11,378.46/x
  3. Step 3: Cross multiply
    20,331.15x = 28,058.22 × 11,378.46
  4. Step 4: Simplify right side
    20,331.15x = 319,259,333.94
  5. Step 5: Solve for x
    x = 319,259,333.94/20,331.15
  6. Step 6: Final answer
    x = 15,702.96

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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.