Home / 20,622.07-28,458.30-11,190.70

Finding the Fourth Proportional to 20,622.07, 28,458.30 and 11,190.70

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Solution

The fourth proportional to 20,622.07, 28,458.30 and 11,190.70 is: 15,443.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.07 : 28,458.30 = 11,190.70 : x
  2. Step 2: Convert to fraction form
    20,622.07/28,458.30 = 11,190.70/x
  3. Step 3: Cross multiply
    20,622.07x = 28,458.30 × 11,190.70
  4. Step 4: Simplify right side
    20,622.07x = 318,468,297.81
  5. Step 5: Solve for x
    x = 318,468,297.81/20,622.07
  6. Step 6: Final answer
    x = 15,443.08

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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.