Home / 20,303.20-28,015.00-11,350.78

Finding the Fourth Proportional to 20,303.20, 28,015.00 and 11,350.78

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Solution

The fourth proportional to 20,303.20, 28,015.00 and 11,350.78 is: 15,662.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,303.20 : 28,015.00 = 11,350.78 : x
  2. Step 2: Convert to fraction form
    20,303.20/28,015.00 = 11,350.78/x
  3. Step 3: Cross multiply
    20,303.20x = 28,015.00 × 11,350.78
  4. Step 4: Simplify right side
    20,303.20x = 317,992,003.29
  5. Step 5: Solve for x
    x = 317,992,003.29/20,303.20
  6. Step 6: Final answer
    x = 15,662.16

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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.