Home / 20,947.96-28,888.32-13,765.24

Finding the Fourth Proportional to 20,947.96, 28,888.32 and 13,765.24

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Solution

The fourth proportional to 20,947.96, 28,888.32 and 13,765.24 is: 18,982.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.96 : 28,888.32 = 13,765.24 : x
  2. Step 2: Convert to fraction form
    20,947.96/28,888.32 = 13,765.24/x
  3. Step 3: Cross multiply
    20,947.96x = 28,888.32 × 13,765.24
  4. Step 4: Simplify right side
    20,947.96x = 397,654,658.00
  5. Step 5: Solve for x
    x = 397,654,658.00/20,947.96
  6. Step 6: Final answer
    x = 18,982.98

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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.