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Finding the Fourth Proportional to 26,666.80, 39,974.60 and 20,740.40

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Solution

The fourth proportional to 26,666.80, 39,974.60 and 20,740.40 is: 31,090.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,666.80 : 39,974.60 = 20,740.40 : x
  2. Step 2: Convert to fraction form
    26,666.80/39,974.60 = 20,740.40/x
  3. Step 3: Cross multiply
    26,666.80x = 39,974.60 × 20,740.40
  4. Step 4: Simplify right side
    26,666.80x = 829,089,193.84
  5. Step 5: Solve for x
    x = 829,089,193.84/26,666.80
  6. Step 6: Final answer
    x = 31,090.69

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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.