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Finding the Fourth Proportional to 55,980.80, 83,969.40 and 18,542.60

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Solution

The fourth proportional to 55,980.80, 83,969.40 and 18,542.60 is: 27,813.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,980.80 : 83,969.40 = 18,542.60 : x
  2. Step 2: Convert to fraction form
    55,980.80/83,969.40 = 18,542.60/x
  3. Step 3: Cross multiply
    55,980.80x = 83,969.40 × 18,542.60
  4. Step 4: Simplify right side
    55,980.80x = 1,557,010,996.44
  5. Step 5: Solve for x
    x = 1,557,010,996.44/55,980.80
  6. Step 6: Final answer
    x = 27,813.30

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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.