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Finding the Fourth Proportional to 27,620.40, 41,430.60 and 20,103.60

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Solution

The fourth proportional to 27,620.40, 41,430.60 and 20,103.60 is: 30,155.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,620.40 : 41,430.60 = 20,103.60 : x
  2. Step 2: Convert to fraction form
    27,620.40/41,430.60 = 20,103.60/x
  3. Step 3: Cross multiply
    27,620.40x = 41,430.60 × 20,103.60
  4. Step 4: Simplify right side
    27,620.40x = 832,904,210.16
  5. Step 5: Solve for x
    x = 832,904,210.16/27,620.40
  6. Step 6: Final answer
    x = 30,155.40

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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.