Home / 21,895.73-30,215.58-12,205.12

Finding the Fourth Proportional to 21,895.73, 30,215.58 and 12,205.12

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Solution

The fourth proportional to 21,895.73, 30,215.58 and 12,205.12 is: 16,842.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,895.73 : 30,215.58 = 12,205.12 : x
  2. Step 2: Convert to fraction form
    21,895.73/30,215.58 = 12,205.12/x
  3. Step 3: Cross multiply
    21,895.73x = 30,215.58 × 12,205.12
  4. Step 4: Simplify right side
    21,895.73x = 368,784,779.77
  5. Step 5: Solve for x
    x = 368,784,779.77/21,895.73
  6. Step 6: Final answer
    x = 16,842.77

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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.