Home / 26,419.20-39,628.80-9,787.20

Finding the Fourth Proportional to 26,419.20, 39,628.80 and 9,787.20

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Solution

The fourth proportional to 26,419.20, 39,628.80 and 9,787.20 is: 14,680.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,419.20 : 39,628.80 = 9,787.20 : x
  2. Step 2: Convert to fraction form
    26,419.20/39,628.80 = 9,787.20/x
  3. Step 3: Cross multiply
    26,419.20x = 39,628.80 × 9,787.20
  4. Step 4: Simplify right side
    26,419.20x = 387,854,991.36
  5. Step 5: Solve for x
    x = 387,854,991.36/26,419.20
  6. Step 6: Final answer
    x = 14,680.80

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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.