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Finding the Fourth Proportional to 40,485.80, 60,704.40 and 20,802.80

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Solution

The fourth proportional to 40,485.80, 60,704.40 and 20,802.80 is: 31,191.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,485.80 : 60,704.40 = 20,802.80 : x
  2. Step 2: Convert to fraction form
    40,485.80/60,704.40 = 20,802.80/x
  3. Step 3: Cross multiply
    40,485.80x = 60,704.40 × 20,802.80
  4. Step 4: Simplify right side
    40,485.80x = 1,262,821,492.32
  5. Step 5: Solve for x
    x = 1,262,821,492.32/40,485.80
  6. Step 6: Final answer
    x = 31,191.71

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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.