Home / 26,996.80-40,430.40-13,129.60

Finding the Fourth Proportional to 26,996.80, 40,430.40 and 13,129.60

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Solution

The fourth proportional to 26,996.80, 40,430.40 and 13,129.60 is: 19,662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,996.80 : 40,430.40 = 13,129.60 : x
  2. Step 2: Convert to fraction form
    26,996.80/40,430.40 = 13,129.60/x
  3. Step 3: Cross multiply
    26,996.80x = 40,430.40 × 13,129.60
  4. Step 4: Simplify right side
    26,996.80x = 530,834,979.84
  5. Step 5: Solve for x
    x = 530,834,979.84/26,996.80
  6. Step 6: Final answer
    x = 19,662.89

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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.