Home / 20,976.48-28,947.84-11,416.66

Finding the Fourth Proportional to 20,976.48, 28,947.84 and 11,416.66

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Solution

The fourth proportional to 20,976.48, 28,947.84 and 11,416.66 is: 15,755.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.48 : 28,947.84 = 11,416.66 : x
  2. Step 2: Convert to fraction form
    20,976.48/28,947.84 = 11,416.66/x
  3. Step 3: Cross multiply
    20,976.48x = 28,947.84 × 11,416.66
  4. Step 4: Simplify right side
    20,976.48x = 330,487,647.01
  5. Step 5: Solve for x
    x = 330,487,647.01/20,976.48
  6. Step 6: Final answer
    x = 15,755.15

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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.