Home / 21,246.10-31,869.69-11,880.88

Finding the Fourth Proportional to 21,246.10, 31,869.69 and 11,880.88

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Solution

The fourth proportional to 21,246.10, 31,869.69 and 11,880.88 is: 17,821.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.10 : 31,869.69 = 11,880.88 : x
  2. Step 2: Convert to fraction form
    21,246.10/31,869.69 = 11,880.88/x
  3. Step 3: Cross multiply
    21,246.10x = 31,869.69 × 11,880.88
  4. Step 4: Simplify right side
    21,246.10x = 378,639,962.53
  5. Step 5: Solve for x
    x = 378,639,962.53/21,246.10
  6. Step 6: Final answer
    x = 17,821.62

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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.