Home / 21,857.30-30,163.02-12,297.20

Finding the Fourth Proportional to 21,857.30, 30,163.02 and 12,297.20

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Solution

The fourth proportional to 21,857.30, 30,163.02 and 12,297.20 is: 16,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.30 : 30,163.02 = 12,297.20 : x
  2. Step 2: Convert to fraction form
    21,857.30/30,163.02 = 12,297.20/x
  3. Step 3: Cross multiply
    21,857.30x = 30,163.02 × 12,297.20
  4. Step 4: Simplify right side
    21,857.30x = 370,920,538.73
  5. Step 5: Solve for x
    x = 370,920,538.73/21,857.30
  6. Step 6: Final answer
    x = 16,970.10

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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.