Home / 20,622.14-28,458.63-11,190.71

Finding the Fourth Proportional to 20,622.14, 28,458.63 and 11,190.71

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Solution

The fourth proportional to 20,622.14, 28,458.63 and 11,190.71 is: 15,443.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.14 : 28,458.63 = 11,190.71 : x
  2. Step 2: Convert to fraction form
    20,622.14/28,458.63 = 11,190.71/x
  3. Step 3: Cross multiply
    20,622.14x = 28,458.63 × 11,190.71
  4. Step 4: Simplify right side
    20,622.14x = 318,472,133.03
  5. Step 5: Solve for x
    x = 318,472,133.03/20,622.14
  6. Step 6: Final answer
    x = 15,443.21

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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.