Home / 20,622.32-28,458.48-11,190.80

Finding the Fourth Proportional to 20,622.32, 28,458.48 and 11,190.80

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Solution

The fourth proportional to 20,622.32, 28,458.48 and 11,190.80 is: 15,443.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.32 : 28,458.48 = 11,190.80 : x
  2. Step 2: Convert to fraction form
    20,622.32/28,458.48 = 11,190.80/x
  3. Step 3: Cross multiply
    20,622.32x = 28,458.48 × 11,190.80
  4. Step 4: Simplify right side
    20,622.32x = 318,473,157.98
  5. Step 5: Solve for x
    x = 318,473,157.98/20,622.32
  6. Step 6: Final answer
    x = 15,443.13

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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.