Home / 26,429.60-39,644.40-19,431.20

Finding the Fourth Proportional to 26,429.60, 39,644.40 and 19,431.20

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Solution

The fourth proportional to 26,429.60, 39,644.40 and 19,431.20 is: 29,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,429.60 : 39,644.40 = 19,431.20 : x
  2. Step 2: Convert to fraction form
    26,429.60/39,644.40 = 19,431.20/x
  3. Step 3: Cross multiply
    26,429.60x = 39,644.40 × 19,431.20
  4. Step 4: Simplify right side
    26,429.60x = 770,338,265.28
  5. Step 5: Solve for x
    x = 770,338,265.28/26,429.60
  6. Step 6: Final answer
    x = 29,146.80

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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.