Home / 20,995.96-28,945.38-15,017.20

Finding the Fourth Proportional to 20,995.96, 28,945.38 and 15,017.20

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Solution

The fourth proportional to 20,995.96, 28,945.38 and 15,017.20 is: 20,702.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.96 : 28,945.38 = 15,017.20 : x
  2. Step 2: Convert to fraction form
    20,995.96/28,945.38 = 15,017.20/x
  3. Step 3: Cross multiply
    20,995.96x = 28,945.38 × 15,017.20
  4. Step 4: Simplify right side
    20,995.96x = 434,678,560.54
  5. Step 5: Solve for x
    x = 434,678,560.54/20,995.96
  6. Step 6: Final answer
    x = 20,702.96

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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.