Home / 21,817.12-30,107.81-12,257.20

Finding the Fourth Proportional to 21,817.12, 30,107.81 and 12,257.20

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Solution

The fourth proportional to 21,817.12, 30,107.81 and 12,257.20 is: 16,915.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,817.12 : 30,107.81 = 12,257.20 : x
  2. Step 2: Convert to fraction form
    21,817.12/30,107.81 = 12,257.20/x
  3. Step 3: Cross multiply
    21,817.12x = 30,107.81 × 12,257.20
  4. Step 4: Simplify right side
    21,817.12x = 369,037,448.73
  5. Step 5: Solve for x
    x = 369,037,448.73/21,817.12
  6. Step 6: Final answer
    x = 16,915.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.