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Finding the Fourth Proportional to 26,651.60, 39,977.40 and 20,430.80

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Solution

The fourth proportional to 26,651.60, 39,977.40 and 20,430.80 is: 30,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,651.60 : 39,977.40 = 20,430.80 : x
  2. Step 2: Convert to fraction form
    26,651.60/39,977.40 = 20,430.80/x
  3. Step 3: Cross multiply
    26,651.60x = 39,977.40 × 20,430.80
  4. Step 4: Simplify right side
    26,651.60x = 816,770,263.92
  5. Step 5: Solve for x
    x = 816,770,263.92/26,651.60
  6. Step 6: Final answer
    x = 30,646.20

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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.