Home / 20,256.80-30,385.50-7,109.28

Finding the Fourth Proportional to 20,256.80, 30,385.50 and 7,109.28

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Solution

The fourth proportional to 20,256.80, 30,385.50 and 7,109.28 is: 10,664.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,256.80 : 30,385.50 = 7,109.28 : x
  2. Step 2: Convert to fraction form
    20,256.80/30,385.50 = 7,109.28/x
  3. Step 3: Cross multiply
    20,256.80x = 30,385.50 × 7,109.28
  4. Step 4: Simplify right side
    20,256.80x = 216,019,027.44
  5. Step 5: Solve for x
    x = 216,019,027.44/20,256.80
  6. Step 6: Final answer
    x = 10,664.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.