Home / 21,429.20-32,172.60-13,653.20

Finding the Fourth Proportional to 21,429.20, 32,172.60 and 13,653.20

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Solution

The fourth proportional to 21,429.20, 32,172.60 and 13,653.20 is: 20,498.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.20 : 32,172.60 = 13,653.20 : x
  2. Step 2: Convert to fraction form
    21,429.20/32,172.60 = 13,653.20/x
  3. Step 3: Cross multiply
    21,429.20x = 32,172.60 × 13,653.20
  4. Step 4: Simplify right side
    21,429.20x = 439,258,942.32
  5. Step 5: Solve for x
    x = 439,258,942.32/21,429.20
  6. Step 6: Final answer
    x = 20,498.15

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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.